IDA activities in July included an endorsement from X-Fab for EMX as well as multiple multiphysics blog posts spanning SI, PI, thermal, EM and microwave analysis domains.(read more)

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With the latest release (Sigrity and Systems Analysis 2022.1 HF2) of Clarity  3D Solver, support for encrypted component models is now available. With this functionality, vendors that supply 3D components, such as connectors, can now merge their...(read more)

IDA activities in August showcased two video interviews with David Maliniak of Microwaves & RF magazine. New posts, datasheets, application notes and white papers highlight multiphysics analysis spanning SI, PI, thermal, EM and microwave analysis domains are also featured.(read more)

By combining finite element analysis with computational fluid dynamics, designers can perform complete thermal system analysis using a single tool.(read more)

Hi, I would be grateful if you can help me with this error which I get after trying to run an EMX simulation on a PCELL.

I've found very limited information in this forum. Thanks

Dear all,

Hi!

I'm trying to do a Harmonic Balance (HB) Large-Signal S-Parameter (LSSP) simulation to figure out the input impedance of a nonlinear circuit.

Through this simulation, what I want to know is the large-signal S11 only (not S12, S21 and S22).

So, I have simulated with only single port (PORT0) at input, but LSSP simulation is terminated and output log shows following text.

" Analysis `hb' was terminated prematurely due to an error "

The LSSP simulation does not proceed without second port.

Should I use floating second port (which is not necessary for my circuit) to succeed the LSSP simulation?

Does the LSSP simulation really need two ports?

Below figure is my HB LSSP simulation setup.

Additionally, Periodic S-Parameter (PSP) simulation using HB is succeeded with only single port.

What is the difference between PSP and LSSP simulations?

Hi everyone,

I'm currently working on my thesis, which involves a beamformer system using CMOS 65nm technology. I'm trying to use the EMX tool for EM simulation but have encountered a few problems. Before diving into my questions about EMX, let me briefly explain how I conduct EM simulations with other software (ADS).

In ADS, I use the EM simulator with the Momentum microwave engine. However, my EM layout is quite large, and the mesh generated is extremely detailed, making it difficult to simulate the entire system. As a workaround, I divide the system into smaller parts and simulate each one individually. I've attached a snapshot of my setup, which includes an amplifier and a 1-to-2 Wilkinson power divider. I've separated these circuits and placed pins to facilitate EM simulations for each. I also placed ground pins at the boundaries of each circuit to connect them to the ground plane.

Here’s the link to the image (I'm unable to upload it due to an error): https://drive.google.com/file/d/13Qn4-DvMBj_K1JQLXrTWaWZ8uaLJr15u/view?usp=sharing

Now, moving on to EMX (version 6.3). For a maximum frequency of 31 GHz, I set the edge mesh = thickness = 0.4 µm (approximately the skin depth). However, when I simulate the circuit (amplifier + divider), the mesh on the ground plane becomes very dense, which makes running the simulation impossible due to excessive memory requirements. I reverted to my ADS approach and divided the circuit into two parts, placing ports to connect them. Unfortunately, EMX doesn't allow me to place multiple edge ports on the same edge for the ground plane, which has left me confused. Here are a couple of questions I have:

1. Is breaking the circuit into smaller parts a valid approach? Given the large ground plane, the mesh size for the ground is significant, making simulations challenging. Are there any methods to manage this issue?

2. Regarding the ground pins, why can't I place multiple edge ports to connect the ground planes of both circuits as I did in ADS? If this approach is incorrect, could you suggest alternative methods for simulating individual circuits and connecting them to estimate system performance?

Any insights would be greatly appreciated. Thank you in advance for your help!

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

Sample clues

18 across: Makoto Hagiwara and David Jung both claim to have invented it (7,6)

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18 across: What Frank Sinatra and George Clooney have in common (6,6)

19 across: Dosa mix, for example (6)

2 down: Green, in a non-environmental way (7)

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18 across: Demonic (8)

20 across: Common language (6,6)

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17 across: Beckham speciality (4,4)

4 down: Havana speciality (5)

19 across: Infamous 1988 commercial against Michael Dukakis (9,4)

11 down: Precisely (2,3,3)

13 down: City infamously ransacked by the Japanese in 1937 (7)

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5 across: The US president’s bird (3,5,3)

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19 across: Masonic ritual (5,6)

1 down: Pioneer of Ostpolitik (6)

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14 across: FDR’s baby (3,4)

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4 down: Slanted character (6)

5 down: New Year’s venue in New York (5,6)

16 down: Atmosphere of melancholy (5)

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6 across: Alejandro González Iñárritu’s breakthrough film (6,6)

19 across: Soft leather shoe (8)

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17 down: Circle of influence (5)

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5 across: Robbie Robertson song about Richard Manuel (6,5)

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10 across: Lionel Richie hit (5)

3 down: ALTAIR, for example (5)

16 down: The problem with Florida 2000 (5)

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9 across: Van Morrison classic from Moondance (7)

6 down: Order beginning with ‘A’ (12)

6 across: Fatal weakness (8,4)

19 across: Rolling Stones classic (12)

4 down: Massacre tool (8)

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hello:

i place a symbol into my design.

on my design, i change the symbol property by unlocking the symbol and unfixing pins so that i can move pins on the symbol.

i move some pins on my design.

but when i export the symbol from my design, the symbol is not current but has the original pin location.

is there a way to retain the pin locations after moving pins on a symbol when exporting the symbol?

regards

masa

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