This article describes the diffraction pattern (2-periodic Fourier transform) from the vertices of a large patch of the recently discovered `Spectre' tiling – a strictly chiral aperiodic monotile. It was reported recently that the diffraction pattern of the related weakly chiral aperiodic `Hat' monotile was 2-periodic with chiral plane-group symmetry p6 [Kaplan et al. (2024). Acta Cryst. A80, 72–78]. The diffraction periodicity arises because the Hat tiling is a systematic aperiodic deletion of vertices from the 2-periodic hexagonal mta tiling. Despite the similarity of the Hat and Spectre tilings, the Spectre tiling is not aligned with a 2-periodic lattice, and its diffraction pattern is non-periodic with chiral point symmetry 6 about the origin.

The SPECTRE 24.1 release is now available for download at Cadence Downloads. For information on supported platforms and other release compatibility information, see the README.txt file in the installation hierarchy.(read more)

I decided it was time to update my spectre install (currently a version of Spectre211).  Since 241 was a larger number than 211 I thought it would be a good idea (LOL)

Anyway, the simulator failed to run, and since I didn't have the time to debug why, I reverted to 211.

What's the difference in the two?

I have tried replicating the setup described in a previous post (here), with the proposed solution.

The MDL measurements return a value of 0 for all exported result but the first.

Using Viva I can actually see the correct value for each contribution.

I am using :
- Spectre 23.1.0.538.isr10
- Viva IC23.1-64b.ISR8.40

What should I do differently?

Thanks!

**** test.measure ****

Measurement Name   :  noi_test
Analysis Type      :  noise
noi_total             =  6.9282e-06
r1_flicker            =  0
r1_thermal            =  0
r1_total              =  0
r2_flicker            =  0
r2_thermal            =  0
r2_total              =  0

I want to use PSpice model (download from TI) in Virtuoso , but it can not work. Please help me to check the error message, Thanks

ADE-> Setup-> simulation files->Pspice  Files  /TPS628502-Q1_TRANS.LIB

Parse error before token ']' in expression '[[STEADY_STATE]*0.6]'. If '[[STEADY_STATE]*0.6]'  is a spice expression, quotes are required for the expression.

ERROR(SFE-46): An instance of 'TPS628502-Q1_TRANS'  can have at most 8 terminals (but has 9).

*****************************************************************************
.SUBCKT TPS628502-Q1_TRANS COMP_FSET EN FB GND PG SW SYNC_MODE VIN
+ PARAMS: STEADY_STATE=0
V_U9_V45 U9_N16725824 0 5
E_U9_ABM22 U9_N16725392 0 VALUE { V(FREQ)*1e-12 }
X_U9_U161 U9_N16849713 U9_N16846056 one_shot PARAMS: T=20

In this post, we will learn about the most important parameters for the analog simulators that affect the accuracy of the simulation results. We will also understand how each parameter limits the accuracy of the measurements for the DC and transient analyses.(read more)

This blog describes the new capabilities in Spectre 21.1 ISR2 through which it provides support to the Voltus-XFi Custom Power Integrity Solution.(read more)

The device is available at a starting price of ₹1,19,999

The HP Spectre x360 16 is a compelling choice for users who prioritise immersive multimedia experiences, A touch of class for the tech-savvy, but is too heavy to use as a tablet

What is the meaning of this error?

I used already two ports (PORT1 and PORT2 for input and output, respectively.

-------------------------------------------------------------------------------------------------------------------------

Also when I apply the PSP analysis for S-parameter the value of maximum S21 value (4.75 dB) is much lower than the maximum power gain (17.6 dB).

while the same circuit is designed using  ADS program the two values are approximately the same around (17.1 dB).

2018 lands with a distinct thud as Charlotte Jee tackles Meltdown and Spectre, David Price wrestles with Apple's batteries and its new iMac Pro, before Miriam Harris works through the Bafta nominations for visual effects. Henry Burrell leads us down the rabbit hole.

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It's been a while since you've heard from me...it has been a busy year for sure. One of the reasons I've been so quiet is that I was part of a team working diligently on our latest best kept secret: The MMSIM 12.1.1/MMSIM 13.1 Documentation has...(read more)

Hi All, Here's another great new feature that I've found very helpful... Broadband SPICE is a new tool for S-parameter simulation in Spectre RF. In the MMSIM13.1.1 ( MMSIM13.1 USR1) release (now available on http://downloads.cadence.com), a...(read more)

Last year, I wrote a blog post entitled Modeling Oscillators with Arbitrary Phase Noise Profiles . We now have an easier way to do this. Starting in MMSIM 13.1 , you can specify the phase noise as an instance parameter in Spectre sources, including...(read more)

Hello Spectre RF Users, Next week is my all time favorite technical conference - the International Microwave Symposium IMS2016 , May 22-27 in San Francisco, CA at the Moscone Center. If you're at the conference, please stop by the Cadence booth and...(read more)

Did you check out the new Pnoise and Hbnoise Choosing Analyses forms in the MMSIM 15.1 and IC6.1.7 /ICADV12.2 releases? These forms have been significantly improved and simplified. The Direct Plot Form has also been enhanced and is much easy to use....(read more)

Cadence ® Spectre ® AMS Designer is a high-performance mixed-signal simulation system. The ability to use multiple engines, and drive from a variety of platforms enables you to "rev...

[[ Click on the title to access the full blog on the Cadence Community site. ]]

Hello, i need to test the  parameter Kf under some conditions in subthreshold.i cannot just plot the OP param,becasue i need to derive it under certain conditions.

Spectre(of Cadence) like BSIM(of Berkley) has developed a method for deriving each parameter in their model.

Is there a way to help me with such manual where i can test in cadence virtuoso the Kf parameter shown in the formula bellow?

Thanks.

Hi,

i'm using spectre HB simulation on PA (Power Amplifier) test_bench to perform large signal analysis (i want to plot Output power vs intput power, PAE and Gain)

Although the simulation returns no error, i still can't plot anything. seem like there is an issue with the ports i'm using. (analoglib ports)

i attach an image of my configuration so maybe you can find something helpful in it. 

thank you all for your help

best regards

Hi

I have this error when I run the simulation 

SPECTRE_DEFAULTS=-I/CMC/kits/tsmc_130nm/CR013G/PDK_OA/PDKOA33/models/spectre -f psfbin
Command line:
/CMC/tools/cadence/MMSIM15.10.801_lnx86/tools.lnx86/bin/spectre -64
input.scs +escchars +log ../psf/spectre.out +inter=mpsc
+mpssession=spectre0_28131_1 -format psfxl -raw ../psf
-I/CMC/kits/cmosp13.V1.8.0.0DM/IBM_PDK/cmrf8sf/V1.8.0.4DM/Spectre/models
-I/CMC/kits/tsmc_130nm/CR013G/PDK_OA/PDKOA33/models/spectre
+lqtimeout 900 -maxw 5 -maxn 5

ERROR (SPECTRE-308): Unable to open input directory '/CMC/kits/tsmc_130nm/CR013G/PDK_OA/PDKOA33/models/spectre'.
Permission denied or no such directory. ERROR (SPECTRE-308): Unable to open input directory '/CMC/kits/tsmc_130nm/CR013G/PDK_OA/PDKOA33/models/spectre'.
Permission denied or no such directory.spectre pid = 29312

Loading /CMC/tools/cadence/MMSIM15.10.801_lnx86/tools.lnx86/cmi/lib/64bit/5.0/libinfineon_sh.so ...
Loading /CMC/tools/cadence/MMSIM15.10.801_lnx86/tools.lnx86/cmi/lib/64bit/5.0/libphilips_o_sh.so ...

Could someone suggest any solution.

Thank you in advance,

Sali

Hi ,

     I have designed analog IP in cadence ADE and simulated in spectre. All corner results looks good. when i run monte carlo 1000 runs have high current in 125C two runs. Simulated with same setup in different user, all clean.Need to know what type sampling method used and why its not clean with my setup.

Thanks,

Anbarasu

I have a question regarding simulating IBIS model using Spectre.  IBIS model generation always has the die capacitance included and in the generated IBIS file you will have this value as  “C_comp” value.  Does the Spectre accounts for this capacitance from the IBIS file while computing the time domain voltage waveform during simulation ?  If I add additional capacitance outside in the testbench, to model the die capacitance, then it will be double counting.

Does anyone know if Spectre is already accounting this C_comp during the time domain voltage wave computation from IBIS file, during simulation ?

Dear All,
When I want to start simulation with spectre the error says:
Fatal error: Illegal library definition found in netlist
I set the model file correctly, but I don't know why it errors!
I opened the ADE>>Setup>>Model library
and I tried to modify the path of models file (SCS files)
It gives me "Illegal library definition found in netlist"
Thanks.

This blog talks about how to enable the AMS Designer flex mode.(read more)

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