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Machines Vs Humans: Chief Of Defence Staff Warns Of Evolving Warfare

Chief of Defence Staff Gen Anil Chauhan asserted that "we are at the cusp of a major change in warfare".




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OpenAI’s Next Flagship AI Model Reportedly Struggling to Outperform Older Models in Certain Tasks

OpenAI is rumoured to be working on the next generation of its flagship large language model (LLM), however, it might have hit a bottleneck. As per a report, the San Francisco-based AI firm is struggling to considerably upgrade the capabilities of its next AI model, internally codenamed Orion. The model is said to be outperforming older models when it comes to language-based tasks but is underwhelming in certain tasks such as coding.




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Sewage Surveillance Might Be a Powerful Tool to Fight Antimicrobial Resistance, New Study Reveals

Sewage surveillance is emerging as a crucial method in combating antimicrobial resistance (AMR), according to new research from Virginia Tech. Published in Nature Water, the study demonstrates that monitoring wastewater provides a more efficient and comprehensive approach to tracking antibiotic-resistant bacteria than testing individuals. This method holds particular promise for underserved communities, where access to healthcare is limited, and AMR-related diseases are most prevalent. The research team, led by experts such as Dr. Leigh-Anne Krometis and Dr. Marc Edwards, explored sewage samples from 62 countries and found significant correlations between AMR levels and socioeconomic factors, such as healthcare accessibility. By examining wastewater, public health officials could gain early insights into AMR spread, allowing them to take targeted actions to protect vulnerable populations. This approach could revolutionise AMR monitoring, particularly in rural and low-income areas, where AMR poses a growing threat.




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Chimpanzees’ Task Performance Improves With Human Audience, Study Finds

A study published in iScience found that chimpanzees performed better on challenging tasks when observed by humans. The research, conducted by Kyoto University, revealed that the presence of a larger human audience improved performance on difficult tasks, while simpler tasks saw a decline in accuracy. This suggests that the audience effect, often linked to human reputation management, may also exist in non-human primates. The study provides insights into social behaviours that might have evolved before the emergence of human reputation-based societies.




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Take-Two Not Concerned About Potential GTA 6 Performance Issues on Xbox Series S

The lower-end Xbox Series S has run into hardware bottlenecks in the past when it comes to new releases, and concerns have been raised about whether the console would be able to run GTA 6 without problems. Take-Two Interactive CEO Strauss Zelnick has now downplayed those concerns, saying he is “not worried” about GTA 6 performance on Xbox Series S.




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NASA and ISRO Join Forces for NISAR Satellite Launch in 2025 to Track Earth’s Changing Surface

The NISAR satellite, a joint NASA-ISRO Earth observation mission launching in 2025, will provide precise data on shifts in Earth’s surface, focusing on high-risk areas. Using advanced radar technology, the satellite aims to support natural disaster response and infrastructure monitoring by tracking subtle movements in regions prone to earthquakes and landslides. With each organisation contributing specialised radar systems, the collaboration is a significant leap forward in space-based Earth monitoring.




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Leonardo DiCaprio Turns 50: Titanic To Inception, A Look At Actor's Best Performances

Leonardo DiCaprio has won numerous Golden Globe Awards, Screen Actors Guild Awards, and BAFTA Awards




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Bigg Boss 18: Rajat Dalal Steps In To Comfort Sara Arfeen Khan After Arfeen Khan's Eviction

Hosted by Salman Khan, Bigg Boss 18 premiered on October 6




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Juhi Chawla Birthday: A Look At Her Career-Best Performances

Juhi Chawla was last seen in the web series Hush Hush




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A Luxurious Evening At D'MONDE Members Club: The Perfect Place To Enjoy Indulgence With Elegance

D'MONDE is an exclusive members-only club that offers opulence through its various offerings.




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5 Simple Tips To Make The Perfect Gajar Ka Achar This Winter

Pickles are like that secret ingredient that makes any meal better. Whether it's dal rice or paratha, a dollop of pickle can turn even the simplest dishes into something special.




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4 Powerful Reasons To Add Seaweed To Your Meals (And How To Make It Delicious)

Tasting seaweed dishes from East Asian cuisine isn't just an adventure for your taste buds - it's loaded with amazing health perks, too!




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Indian-Origin Woman Buys Matthew Perry's Los Angeles Home, Performs 'Puja'

Before moving in, Ms Lalliam and her family also performed a customary 'puja' and prayer ceremony to honour the actor's spirit and legacy.




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New Historical Marker Dedication: Surf Safety Line at Rehoboth Beach

The State of Delaware Historical Markers Program will unveil its newest Historical Marker for the Surf Safety Line at Rehoboth Beach. This dedication will be held on Thursday, April 14th, 2022 at 10:00 AM at: The Bandstand 1 Rehoboth Avenue Rehoboth Beach, Delaware 19971   The Surf Safety Line was a project funded by the […]




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Wastewater, Surface Water and Drinking Water Planning Grant Proposals Now Being Accepted by DNREC, DPH

State government agencies, county and municipal governments, and conservation districts can now submit proposals to the Delaware Department of Natural Resources and Environmental Control and the Delaware Division of Public Health to receive matching grants for wastewater, surface water and drinking water project planning.




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DNREC Reminds Drive-On Surf Anglers Reservations are Required for Fourth of July Holiday

The Delaware Department of Natural Resources and Environmental Control reminds those who plan to drive-on surf fish at one of the seven Delaware State Parks multi-use beaches that reservations are required during summer weekends and holidays. Drive-on surf fishing reservations for Thursday, July 4, open Thursday, June 27, at 11 a.m. Drive-on reservations for each weekend open weekly beginning Tuesdays for the upcoming Saturday and Wednesdays for the upcoming Sunday, and are available until sold out for that weekend.




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DNREC Soliciting Project Proposals For Surface Water Matching Planning Grants

Delaware county and municipal governments, conservation districts, and estuary programs can now submit proposals to DNREC through Aug. 21 to receive matching grants for surface water project planning.




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Delaware Waterfowl and Trout Stamp Art Winners Chosen

Delaware wildlife artist Richard Clifton and Nebraskan artist Dennis Arp took top honors in DNREC's annual Waterfowl Stamp and Trout Stamp art contests, with Clifton's painting of a Canada goose for the 2025/26 Delaware Waterfowl Stamp and Arp's painting of a brook trout for the 2025 Delaware Trout Stamp.



  • Department of Natural Resources and Environmental Control
  • Division of Fish and Wildlife
  • News
  • fishing
  • hunting
  • state trout stamp
  • State waterfowl stamps
  • wildlife art

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DNREC Study Finds PFAS in Surface Water Samples

The Department of Natural Resources and Environmental Control released findings from DNREC’s comprehensive study on PFAS (per- and polyfluoroalkyl substances) in surface waters across Delaware.




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Acer Swift 3 OLED Review || A Truly Powerful Thin and Light Machine




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Hezbollah's Hassan Nasrallah: The Most Powerful Man In Lebanon

Backed by Iran and hated by Israel, Hezbollah chief Hassan Nasrallah is Lebanon's most powerful man. He enjoys cult status among his Shiite supporters and holds sway over the country's institutions.





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Performing a net trace in a CDL file

Hi,

I am looking to perform a net trace in a CDL file.

There is a net at a lower level and would like to know the net it is connected to at the top level.

Please let me know if there is a way to analyze the CDL file to perform this net trace.

Thanks,

Mallikarjun.




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μWaveRiders: Thermal Analysis for RF Power Applications

Thermal analysis with the Cadence Celsius Thermal Solver integrated within the AWR Microwave Office circuit simulator gives designers an understanding of device operating temperatures related to power dissipation. That temperature information can be introduced into an electrothermal model to predict the impact on RF performance.(read more)




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New Training Courses for RF/Microwave Designers Featuring Cadence AWR Software

Cadence AWR Design Environment Software Featured in Multiple Training Course Options: Live and Virtual Starting in October(read more)





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Training Webinar: Microwave Office: An Integrated Environment for RF and Microwave Design

A recording of a training webinar on Microwave Office is available. Topics show the design environment, with special emphasis placed on electromagnetic (EM) simulation. Normal 0 false false false EN-US JA X-NONE ...(read more)




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Unlock Your RF Engineering Potential with a Cadence AWR Free Academic Trial!

Are you ready to revolutionize your RF design experience? Look no further! Cadence AWR software is your gateway to mastering the intricacies of Radio Frequency (RF) circuit design, and now, you can explore its power with our exclusive Free Academic T...(read more)




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Coalesce Xcelium Apps to Maximize Performance by 10X and Catch More Bugs

Xcelium Simulator has been in the industry for years and is the leading high-performance simulation platform. As designs are getting more and more complex and verification is taking longer than ever, the need of the hour is plug-and-play apps that ar...(read more)




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JEDEC UFS 4.0 for Highest Flash Performance

Speed increase requirements keep on flowing by in all the domains surrounding us. The same applies to memory storage too. Earlier mobile devices used eMMC based flash storage, which was a significantly slower technology. With increased SoC processing speed, pairing it with slow eMMC storage was becoming a bottleneck. That is when modern storage technology Universal Flash Storage (UFS) started to gain popularity. 

UFS is a simple and high-performance mass storage device with a serial interface. It is primarily used in mobile systems between host processing and mass storage memory devices. Another important reason for the usage of UFS in mobile systems like smartphones and tablets is minimum power consumption. 

To achieve the highest performance and most power-efficient data transport, JEDEC UFS works in collaboration with industry-leading specifications from the MIPI® Alliance to form its Interconnect Layer. MIPI UniPro is used as a transport layer, and MIPI MPHY is used as a physical layer with the serial DpDn interface. 

 

UFS 4.0 specification is the latest specification from JEDEC, which leverages UniPro 2.0 and MPHY 5.0 specification standards to achieve the following major improvements:

  • Enables up to 4200 Mbps read/write traffic with MPHY 5.0, allowing 23.29 Gbps data rate. 
  • High Speed Link Startup, along with Out of Order Data Transfer and BARRIER Command, were introduced to improve system latencies. 
  • Data security is enhanced with Advanced RPMB. Advance RPMB also uses the EHS field of the header, which reduces the number of commands required compared to normal RPMB, increasing the bandwidth. 
  • Enhanced Device Error History was introduced to ease system integration. 
  • File Based Optimization (FBO) was introduced for performance enhancement. 

Along with many major enhancements, UFS 4.0 also maintains backward compatibility with UFS 3.0 and UFS 3.1. 

JEDEC has just announced the UFS 4.0 specification release, quoting Cadence support as a constant contributor in the JEDEC UFS Task Group, actively participating in these specifications development.  

With the availability of the Cadence Verification IP for JEDEC UFS 4.0, MIPI MPHY 5.0 and MIPI UniPro 2.0, early adopters can start working with the provisional specification immediately, ensuring compliance with the standard and achieving the fastest path to IP and SoC verification closure.  

More information on Cadence VIP is available at the Cadence VIP Website. 

 

Yeshavanth B N 




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BoardSurfers: Optimizing RF Routing and Impedance Using Allegro X PCB Editor

Achieving optimal power transfer in RF PCBs hinges on meticulously routed traces that meet specific impedance requirements. Impedance matching is essential to ensure that traces have the same impedance to prevent signal reflection and inefficient pow...(read more)




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BoardSurfers: Some Wisdom from Designing for a High-Volume Production OEM

At what stage in the design cycle do you start to think about the PCB material costs? What about the costs to assemble the PCB? Once a design becomes successful, should you then redesign it to achieve a scalable product? Placing components and routi...(read more)




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BoardSurfers: Optimizing Designs with PCB Editor-Topology Workbench Flow

When it comes to system integration, PCB designers need to collaborate with the signal analysis or integrity team to run pre-route or post-route analysis and modify constraints, floorplan, or topology based on the results. Allegro PCB Edito...(read more)




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Maximizing Display Performance with Display Stream Compression (DSC)

Display Stream Compression (DSC) is a lossless or near-lossless image compression standard developed by the Video Electronics Standards Association (VESA) for reducing the bandwidth required to transmit high-resolution video and images. DSC compresses video streams in real-time, allowing for higher resolutions, refresh rates, and color depths while minimizing the data load on transmission interfaces such as DisplayPort, HDMI, and embedded display interfaces.

Why Is DSC Needed?

In the ever-evolving landscape of display technology, the pursuit of higher resolutions and better visual quality is relentless. As display capabilities advance, so do the challenges of managing the immense amounts of data required to drive these high-performance screens. This is where DSC steps in. DSC is designed to address the challenges of transmitting ultra-high-definition content without sacrificing quality or performance. As displays grow in resolution and capability, the amount of data they need to transmit increases exponentially. DSC addresses these issues by compressing video streams in real-time, significantly reducing the bandwidth needed while preserving image quality.
 

DSC Use in End-to-end System

DSC Key Features

  • Encoding tools:
    • Modified Median-Adaptive Prediction (MMAP)
    • Block Prediction (BP)
    • Midpoint Prediction (MPP)
    • Indexed color history (ICH)
    • Entropy coding using delta size unit-variable length coding (DSU-VLC)
  • The DSC bitstream and decoding process are designed to facilitate the decoding of 3 pixels/clock in practical hardware decoder implementations. Hardware encoder implementations are possible at 1 pixel/clock.
  • DSC uses an intra-frame, line-based coding algorithm, which results in very low latency for encoding and decoding.

DSC encoding algorithm
 

  • Compression can be done to a fractional bpp. The compressed bits per pixel ranges from 6 to 63.9375.
  • For validation/compliance certification of DSC compression and decompression engines, cyclic redundancy checks (CRCs) are used to verify the correctness of the bitstream and the reconstructed image.
  • DSC supports more color bit depths, including 8, 10, 12, 14, and 16 bpc.
  • DSC supports RGB and YCbCr input format, supporting 4:4:4, 4:2:2, and 4:2:0 sampling.
  • Maximum decompressor-supported bits/pixel values are as listed in the Maximum Allowed Bit Rate column in the table below

  • DP DSC Source device shall program the bit rate within the range of Minimum Allowed Bit Rate column in the table:

          


Summary

Display Stream Compression (DSC) is a technology used in DisplayPort to enable higher resolutions and refresh rates while maintaining high image quality. It works by compressing the video data transmitted from the source to the display, effectively reducing the bandwidth required. DSC uses a visually lossless algorithm, meaning that the compression is designed to be imperceptible to the human eye, preserving the fidelity of the image. This technology allows for smoother, more detailed visuals at higher resolutions, such as 4K or 8K, without requiring a significant increase in data bandwidth.

More Information

  • Cadence has a very mature Verification IP solution. Verification over many different configurations can be used with DisplayPort 2.1 and DisplayPort 1.4 designs, so you can choose the best version for your specific needs.
  • The DisplayPort VIP provides a full-stack solution for Sink and Source devices with a comprehensive coverage model, protocol checkers, and an extensive test suite.
  • More details are available on the DisplayPort Verification IP product page, Simulation VIP pages.
  • If you have any queries, feel free to contact us at talk_to_vip_expert@cadence.com




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A Brief on Message Bus Interface in PIPE

PHY Interface for the PCI Express (PCIe), SATA, USB, DisplayPort, and USB4 Architectures (PIPE) enables the development of the Physical Layer (PHY) and Media Access Layer (MAC) design separately, providing a standard communication interface between these two components in the system.

In recent years, the PIPE interface specification has incorporated many enhancements to support new features and advancements happening in the supported protocols. As the supported features increase, so does the count of signals on PIPE interface. To address the issue of increasing signal count, the message bus interface was introduced in PIPE 4.4 and utilized for PCIe lane margining at the receiver and elastic buffer depth control.

In PIPE 5.0, all the legacy PIPE signals without critical timing requirements were mapped into message bus registers so that their associated functionality could be accessed via the message bus interface instead of implementing dedicated signals. It was decided that any new feature added in the new version of PIPE specification will be available only via message bus accesses unless they have critical timing requirements that need dedicated signals.

Message Bus Interface

The message bus interface provides a way to initiate and participate in non-latency-sensitive PIPE operations using a small number of wires. It also enables future PIPE operations to be added without adding additional wires. The use of this interface requires the device to be in a power state with PCLK running.

Control and status bits used for PIPE operations are mapped into 8-bit registers that are hosted in 12-bit address spaces in the PHY and the MAC. The registers are accessed using read-and-write commands driven over the signals M2P_MessageBus[7:0] and P2M_MessageBus[7:0]. These signals are synchronous with the PCLK and are reset with Reset#.

Message Bus Interface Commands

The 4-bit commands are used for accessing the PIPE registers across the message bus. A transaction consists of a command and any associated address and data.

All the following are time multiplexed over the bus from MAC and PHY:

  1. Commands (write_uncommitted, write_committed, read, read completion, write_ack)
  2. 12-bit address used for all types and read and writes
  3. 8-bit data, either read or written

There can be cases where multiple PIPE interface signals can change on the same PCLK. To address such cases, the concept of write_uncommitted and write_committed is introduced.

The uncommitted write should be saved into a write buffer, and its associated data values are updated into the relevant PIPE register at a future time when a write_committed is received, taking effect during the same PCLK cycle. Once a write_committed is sent, no new writes, whether committed or uncommitted, and any read command may be sent until a write_ack is received. Also, it is allowed to send NOP commands between write uncommitted and write committed. 

A simple timing demonstration of message bus:

Message Address Space

MAC and PHY each implement unique 12-bit address spaces. These address spaces will host registers associated with the PIPE operations. MAC accesses PHY registers using M2P_MessageBus[7:0], and PHY accesses the MAC registers using the M2P_MessageBus[7:0].

The MAC and PHY access specific bits in the registers to: initiate operations, Initiate handshakes, and Indicate status.

Each 12-bit address space is divided into four main regions: the receiver address region, the transmitter address region, the common address region, and the vendor-specific address region.

Each register field has an attribute description of either level or 1-cycle assertion. When a level field is written, the value written is maintained by the hardware until the next write to that field or until a reset occurs. When a 1-cycle field is written to assert the value high, the hardware maintains the assertion for only a single cycle and then automatically resets the value to zero on the next cycle.

Cadence has a mature Verification IP solution for the verification of various aspects and topologies of PIPE PHY design. For more details, you may refer to the Simulation VIP for PIPE PHY | Cadence page, or you may send an email to support@cadence.com.




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Solutions to Maximize Data Center Performance Featured at OCP Global Summit 2024

The demand for higher compute performance, energy efficiency, and faster time-to-market drove the conversations at this year's Open Compute Project (OCP) Global Summit in San Jose, California. It was the scene of showcasing groundbreaking innovations, expert-led sessions, and networking opportunities to drive the future of data center technology. For those who didn't get to attend or stop by our booth, here's a recap of Cadence's comprehensive solutions that enable next-generation compute technology, AI data center design, analysis, and optimization. Optimized Data Center Design and Operations As the data center community increasingly faces demands for enhanced efficiency, thermal management, sustainability, and performance optimization, data center operators, IT managers, and executives are looking for solutions to these challenges. At the Cadence booth, attendees explored the Cadence Reality Digital Twin Platform and Celsius EC Solver. These technologies are pivotal in achieving high-performance standards for AI data centers, providing advanced digital twin modeling capabilities that redefine next-generation data center design and operation. The Celsius EC Solver demonstration showed how it solves challenging thermal and electronics cooling management problems with precision and speed. CadenceCONNECT: Take the Heat Out of Your AI Data Center Cadence hosted a networking reception on October 16 titled "Take the Heat Out of Your AI Data Center." In today's AI era, managing the heat generated by high-density computing environments is more critical than ever. This reception offered insights into current and emerging data center technologies, digital twin cooling strategies that deliver energy-saving operations, and a chance to engage with industry leaders, Cadence experts, and peers to explore the latest cooling, AI, and GPU acceleration advancements. Here's a recap: Researcher, author, and entrepreneur Dr. Jon Koomey highlighted the inefficiency of data centers in his talk "The Rise of Zombie Data Centers," noting that 20-30% of their capacity is stranded and unused. He advocated for organizational changes and technological solutions like digital twins to reduce wasted energy and improve computational effectiveness as AI deployments increase. In "A New Millennium in Multiphysics System Analysis," Cadence Corporate VP Ben Gu explained the company's significant strides in multiphysics system analysis, evolving from chip simulation to a broader application of computational software for simulating various physical systems, including entire data centers. He noted that the latest Cadence venture, a digital twin platform for data center optimization, opened the opportunity to use simulation technology to optimize the efficiency of data centers. Senior Software Engineering Group Director Albert Zeng highlighted the Cadence Reality DC suite's ability to transform data center operations through simulation, emphasizing its multi-phase engine for optimal thermal performance and the integration of AI capabilities for enhanced design and management. A panel discussion titled "Turning AI Factory Blueprints into Reality at the Speed of Light" featured industry experts from NVIDIA, Norman Wright Precision Environmental and Power, NV5, Switch Data Centers, and Cadence, who explored the evolving requirements and multidimensional challenges of AI factories, emphasizing the need for collaboration across the supply chain to achieve high-performing and sustainable data centers. Watch the highlights. Transforming Designs from Chips to Data Centers The OCP Global Summit 2024 has reaffirmed its status as a pivotal event for data center professionals seeking to stay at the forefront of technological advancements. Cadence's contributions, from groundbreaking digital twin technologies to innovative cooling strategies, have shed light on the path forward for efficient, sustainable data centers. For data center professionals, IT managers, and engineers, the insights gained at this summit are invaluable in navigating the challenges and opportunities presented by the burgeoning AI era. Partnering with Arm Arm Total Design Cadence is a member of the Arm Total Design program. At an invitation-only special Arm event, Cadence's VP of Research and Development, Lokesh Korlipara, delivered a presentation focusing on data center challenges and design solutions with Arm Neoverse Compute Subsystem (CSS). The session highlighted: Efficient integration of Arm Neoverse CSS into system on chips (SoCs) with pre-integrated connectivity IP Performance analysis and verification of the Neoverse CSS integration into the SoC through Cadence's System VIP verification suite and automated testbench creation, enhancing both quality and productivity Jumpstarting designs through Cadence's collaboration with Arm for 3D-IC system planning, chiplets, and interposers Design Services readiness and global scale to support and/or deliver the most demanding Arm Neoverse CSS-based SoC design projects Cadence Supports Arm CSS in Arm Booth During the event, Cadence conducted a demo in the Arm booth that showcased the Cadence System VIP verification suite. The demo highlighted automated testbench creation and performance analysis for integrating the Arm CSS into SoCs while enhancing verification quality and productivity. Summary Cadence offers data center solutions for designing everything from the compute and networking chips to the board, racks, data centers, and campuses. Stay connected with Cadence and other industry leaders to continue exploring the innovations set to redefine the future of data centers. Learn More Cadence Joins Arm Total Design Cadence Arm-Based Solutions Cadence Reality Digital Twin Platform




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TensorFlow Optimization in DSVM: Azure and Cadence

Hello Folks,

Problem statement first: How does one properly setup tensorflow for running on a DSVM using a remote Docker environment? Can this be done in aml_config/*.runconfig?

I receive the following message and I would like to be able to utilize the increased speeds of the extended FMA operations.

tensorflow/core/platform/cpu_feature_guard.cc:140] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2 FMA

Background: I utilize a local docker environment managed through Azure ML Workbench for initial testing and code validation so that I'm not running an expensive DSVM constantly. Once I assess that my code is to my liking, I then run it on a remote docker instance on an Azure DSVM.

I want a consistent conda environment across my compute environments, so this works out extremely well. However, I cannot figure out how to control the tensorflow build to optimize for the hardware at hand (i.e. my local docker on macOS vs. remote docker on Ubuntu DSVM)




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c interface with specman

Hi,

 I need to call a  c function form specman . I had followed the below steps.


File vb_pattern.e
---------------------------------

 
struct vb_pattern_s
{
  %data_in_ch0 : uint (bits : 4);   // data on channel 0
  %data_in_ch1 : uint (bits : 4);   // data on channed 1
  %data_in_ch2 : uint (bits : 4);   // data on channel 2
  %mode : uint (bits : 1);          // mode 
  %enable : uint (bits : 1);        // enable

};

C export vb_pattern_s;

------

file  x_output_bfm.e
--------------------------------------------

check_patterns()@clk_e is
{

  ...
 exp_viterbi_op();

}

routine exp_viterbi_op() is C routine viterbi_c_func;

---- EOF------

X.c
#include "vb_pattern.h"

void viterbi_c_func ()
{
 SN_TYPE(vb_pattern_s) vb_packet;
 SN_TYPE(mode)   mode;
 vb_packet = SN_SYS->ops
 mode = vb_packet->mode;
 printf(" Printing from C environment MODE = %h ", mode);

}


------------------- EOF----

x_top.e
------------
import  tb/vb_pattern.e;
import  tb/x_input_bfm.e;
import  tb/x_output_bfm.e;
import  tb/x_cover_dut.e;
import  tb/x_env.e;




I  did the following comand


>> sn_compile.sh -h_only x_top.e -o vb_pattern.h
>> gcc -c viterbi.c -o viterbi.o

I am getting the following error


viterbi.c: In function `viterbi_c_func':
viterbi.c:6: error: `t__mode' undeclared (first use in this function)
viterbi.c:6: error: (Each undeclared identifier is reported only once
viterbi.c:6: error: for each function it appears in.)
viterbi.c:6: error: syntax error before "mode"
viterbi.c:7: error: `mode' undeclared (first use in this function)


Please help me resolve this.

Kesav



  








 


Originally posted in cdnusers.org by kesava





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BoardSurfers: Managing Silkscreen Data Using Allegro 3D Canvas

The silkscreen layer plays a crucial role in the assembly, repair, and testing of a PCB. You can add a variety of information to this layer, such as the location of the components, polarity, component orientation, on-off switches, LEDs, and testpoint...(read more)




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BoardSurfers: Managing Design Constraints Efficiently Using Constraint Sets

A constraint is a user-defined property, or a rule, applied to a physical object, such as a net, pin, or via in a design. There are a number of constraints that can be applied to an object based on its type and behavior. For example, you can define t...(read more)




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BoardSurfers: Training Insights: What’s New in the Allegro PCB Editor Basic Techniques Course

The Allegro PCB Editor Basic Techniques course provides all the essential training required to start working with Allegro® PCB Editor. The course covers all the design tasks, including padstack and symbol creation, logic import, constraints setup...(read more)




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Figures missing in the RF Design Blogs article of "Measuring Fmax for MOS Transistors"

Hi I noticed that some figures from the old posts in the cadence blogs have been missing.

I think this problem happened before and Andrew Beckett asked the original author to fix the issue:

 Figures missing in the RF Design Blogs article of "Measuring Fmax for MOS Transistors" 

Some of these posts are quite valuable, and would be nice to have access to the figures, which are a very important part of some posts,

Thanks

Leandro




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Virtuoso Meets Maxwell: Getting Your Existing SiP File Into Virtuoso RF Solution

I have been involved in the Virtuoso RF Solution for the last four years. Most of the customers I work with have a SiP package already in progress. They often ask "How do I get my SiP design into Virtuoso RF Solution?" I am excited about new functionality in the latest ICADVM20.1 ISR25 release. It is a new GUI under the Tools menu called Enablement. (read more)




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Start Your Engines: An Innovative and Efficient Approach to Debug Interface Elements with SimVision MS

This blog introduces you to an efficient way to debug interface elements or connect modules in a mixed-signal simulation.(read more)




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Virtuoso Meets Maxwell: Completing the Virtuoso RF Solution Assisted Flow

In my last blog, Getting Your Existing SiP File Into Virtuoso RF, I talked about the new enhancements in ICADVM20.1 ISR25 for Virtuoso RF Solution. At the end of the blog, I told you about the Fully Assisted Roundtrip flow, which includes importing SiP files that are compatible with the Virtuoso RF Solution assisted import flow into the Virtuoso platform. Let's examine how the Fully Assisted Roundtrip flow works in this blog.(read more)




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How to perform the reflection and crosstalk using the OrCAD X Professional

Dear Community,

I have created a PCB layout with multiple high-speed nets, I want to check the SI like how signals are reflected and taken to each other.

I have the OrCAD X Professional, how to check the reflection and crosstalk using the OrCAD X Professional software version 24.1.

I want to create a topology flow to the PCB layout and perform the reflection and crosstalk.

Regards,

Rohit Rohan




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How to perform the EMI / EMC analysis on the PCB layout

Hai Community,

I have a PCB board which has multiple high speed nets and I want to perform the EMI and EMC checking.

Which Cadence tool should I use for checking the EMI and EMC coupling?

Regards,

Rohit Rohan




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Optimizing PCB design for thermal performance

Optimizing PCB thermal performance is essential in today’s high-density designs, as it ensures stability, prolongs component life, and prevents potential thermal issues. One of the first steps to achieving this is with strategic component placement. Positioning high-power components—such as regulators, power transistors, or processors—away from heat-sensitive parts can prevent thermal interference, and placing them near the edges of the PCB often helps dissipate heat more effectively. It’s also beneficial to group components by their heat generation, creating dedicated thermal zones that can manage localized heating and reduce impact on other areas of the board.

 

Using thermal vias is another effective technique. By placing thermal vias under components like BGAs or power ICs, heat can be transferred from the surface to internal layers or ground planes. Increasing the size and number of these vias, or using thicker plating, enhances heat conductivity and helps manage heat more evenly across layers in multilayer boards. Increasing copper thickness on the PCB also has a major impact. Opting for thicker copper layers (e.g., 2 oz or even 3 oz copper) significantly boosts the heat dissipation capabilities of power planes and traces, especially in high-current areas. Large copper planes, such as dedicated ground or power planes, are equally effective in spreading heat efficiently. Adding thermal pads directly beneath heat-generating components improves this heat distribution.

 

Thermal relief pads help regulate heat flow for through-hole components by controlling heat transfer, which reduces thermal stress during soldering and prevents excessive heat spread to nearby sensitive areas. Performing thermal analysis with software tools like Celsius can be invaluable, as it allows you to simulate and model heat distribution, spot potential thermal issues, and refine your design before finalizing it.

 

Using heat sinks and thermal pads provides a direct way to draw heat from high-power components. Heat sinks can be attached with thermal adhesives, screws, or clamps, while thermal interface materials (TIMs), such as thermal pads or conductive adhesives, further reduce thermal resistance, enhancing heat-transfer efficiency. Optimizing the PCB layer stackup is also a key factor. Dedicated ground and power layers improve heat conduction across the PCB, enabling heat transfer between layers, particularly in high-density and multilayer PCBs.

 

In designs with high power requirements, active cooling options like fans, blowers, or heat pipes can be essential, helping to direct airflow across the PCB and further improving heat dissipation. Adding ventilation slots around hot zones and considering passive cooling paths enhance natural airflow, making the design more thermally efficient. By combining several of these techniques, you can create a PCB that handles heat effectively, resulting in a robust, long-lasting, and reliable product.

 

Let us know if you’ve had any challenges with thermal management in your designs—I’d be glad to discuss further!




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