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Pss Analysis In Spectre

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53 Threads found on edaboard.com: Pss Analysis In Spectre
Can you share your setup settings for the pss analysis?
Hi I am designing a switching amplifier with 300MHz switching frequency and 20MHz input frequency. I was doing the pss analysis in spectre RF and found out that the software is considering 300MHz to 299.91MHz. Because of this software is giving the following error while running pss analysis. ERROR, (...)
Hi everyone, I want to simulate the effect of mismatch and process variation on the system performance of my SAR Analog to Digital Converter. The system now is simply ideal system with only one transistor level block, the other blocks are written in Verilog-A code in Cadence-spectre. The easiest way to simulate the mismatch and process v
Hi all, i have to calculate the output power of VCO in cadence spectre. i am using pss & pnoise analysis. Actually the Collpitts I/Q VCO (4.8Ghz) is designed by another person. I just know its specs. Its o/p swing is +0.75V to -0.75V. After doing the analysis i go to Results>Direct Plot>Main Form it asks for the (...)
Hello guys, Regarding phase noise simulation of oscillators: which tool (spectreRF - pss/PNOISE analysis or GoldenGate) provides the most accurate results? Is there any material comparing the performance of both tools? Mathematically: do they compute the phase noise in a different way? Thank you very much, Best regards,
Hello everyone, I encounter some boring warnings and errors listed as follows during pss simulation in Cadence spectreRF. Warning from spectre at time = 475.28 fs during periodic steady state analysis `sweeppss-014_pss', during Sweep analysis (...)
hello friends I have designed the folded cascode opamp...(fully-differential)....i have added SC-CMFB circuit to Amplifier ....but i am getting problem in simulating with pss and PAC analysis.. my detailed steps for the analysis are as follows... set pss simulation for clock of 2.56MHz and input (...)
Hey I´d like to do a phase noise analysis with cadence virtuoso. In my pss analysis the estimated frequency (direct plot harmonic frequency) does not match to the beat frequendy i´ve entered in the simulation set up file. to set up the simulation i followed the spectre rf workshop. what could be the problem there? (...)
I am simulating a Class E RF Power Amplifier in Cadence Virtuoso spectre. I am just wondering that if it is normal to measure 1dB power compression point of a non linear (switching) power amp like Class E? Why? If yes, then I am not sure if I set up the pss analysis right. Could you please check it right below? (433MHz is the operating (...)
For a nonlinear Class E Power Amplifier, if I want to check its 3dB bandwidth, do I just do a parametric sweep analysis of frequency of the input signal and see the frequency vs power gain plot?Use pss analysis with sweeping fundamental frequency which is a frequency of driving signal.
If you didn't simulate your structure starting from DC, spectre will not extrapolate the s-parameters down to DC. Generally, spectre has some issues with s-parameters when DC ( f=0Hz) is included, pay attention to this point.Especially pss analysis may not converge or the results may not be correct because of this discrete (...)
i think for jitter, you have to measure the eyediagram of the signal. for phase noise of a pll in cadence spectre, just do pss and pnoise analysis. actually you can get the help from CDSDOC file.
you can use pss + PNOISE analysis, to simulate individual block phase noise.
I am getting the following error during pss analysis - Internal error found in spectre during periodic steady state analysis `pss2Tones'. Please run `getspectreFiles' or send the netlist, the spectre log file, the behavioral model files, and any other information that (...)
In "option" window of transient analysis, there is a field to fill that you can save the transient analysis results by defining a file name as for instance "transient.ts".. Then you can use this file in pss analysis again in option window by filling simply the file name which you have save before..
Hi, you probably have the licenses/installation for spectre-rf. in our environment the pss analysis is just there. we are using ic5141 + mmsim61. regards hqqh
You can do it by pss analysis and some DC sweep function available at the bottom of the pss analysis form. I did it long time back. Since THD is a perfect periodic analysis in most of the circuits, pss analysis gives a good final solution of the circuit. It provides the DC (...)
see the following: spectre -h pss spectre -h pnoise .../MMSIM/doc/spectreRF .../MMSIM/doc/spectreRFTheory .../MMSIM/doc/spectreRFvol2
do pss and pnoise analysis. in pnoise setting page, select "jitter" for noise type. the result can be seen in direct plot -> main form.
Hello people, I am having some trouble simulating the NF of a mixer I designed. I am trying to simulate its performance using spectre Periodic Noise Figure analysis (combined with pss of course), in the ways described both in CADENCE's app note ( ) and in a tutorial from a Sweden University
Hello Friends... Can anyone guide me how to do pss analysis in Cadence spectre. Coz i need to simulate Switched capacitor filter for which pss analysis is required. Can anyone tell how to do brief... Thanks in Advance Bhagath
What do you mean by a transient bias point? You can simulate noise in circuits with large-signal bias schemes ( such as VCOs and mixers ) using pss and qpss analysis in Cadence.
I need simulate AC for SC- S/H How use pss analysys in spectre? I do not understand parameters. Explain me pls. Or may be some tutorials? Thanks a lot.
I do not think there is any specific command to simulate 1/f noise ONLY. What you can do is to do a noise analysis (AC or pss), start with very low frequency, then you should be able to see the 1/f noise contribution at low frequency depends on your biasing of your MOSFET
hi, everyone I have a problem of simulation jitter of PLL in cadence 5141. when i was running pss, some error appeared: Error found by spectre during periodic steady state analysis `pss'. `V1' is a periodic input signal, which is inconsistent with autonomous circuits. PS: V1 is the reference source of the PLL. (...)
hi, everyone I have a problem of simulation jitter of PLL in cadence 5141. when i was running pss, some error appeared: Error found by spectre during periodic steady state analysis `pss'. `V1' is a periodic input signal, which is inconsistent with autonomous circuits. PS: V1 is the reference source of the PLL. I (...)
pss + pnoise
How to do pss analysis in cadence spectre..I had given pss run for SC filter with sampling freq=10MHz and fun=3KHz.Its taking very long time to simulate..I am not ablet debug the problem.plz help me?
use pss may help
Hi, I'm simulating a vco using cadence IC5033. Have run trans analysis and the vco can oscillate well, and output log shows no warning. From the result of trans analysis, I set the tstab parameter in pss. But when running pss analysis, the warning "PM0: The bulk-drain junction current exceed 'imelt'. The (...)
In hspice, save operating points into a ic, then load this ic and run ac analysis . In spectre, do pss and pac analysis.
Hi, Which tool are you using? If you are using spectre-RF then choose pss analysis and in the menu there is an option for DC sweep. Prakash.
pss analysis of spectre in oscillator mode is best suited for VCO simulations.
try to use conservtive, minimize simulation max step. use qpss.
For RF analyses in spectre pss, qpss, pac,psp ... and etc. As I am not a RF engineer. what is the use of those analysis? any reference I know study such that I know what are they? thx
which kind you can calculate and also simulate. if you calculate you must use the small signal circuit if you simulate you use pss and pnoise in spectre
Please post the log files rf_ahdl.stdout and rf_ahdl.stderr in the dir of "/home/hpeesof/agilent-model-cache/cml/1.20/linux_x86/spectre_01488_20060613_015854_1804289383/lib.linux_x86" It seems that there is some error with the rf_ahdl.cml file. spectre already provides HB algorithm in pss analysis. If you just want to (...)
U need to do it through the Sweep option (Present at the end of pss analysis form)in the pss analysis if you want exact answers. Use port instance for your input signal from analogLib provided.... Use the power in dB option available in the input port instance.....give a variable there and specify tht varible in the swept (...)
Dear All, I am simulating LNA and other RF components in spectre for the 1st time. Is there any good document where I can learn more on pss,PAC, Noise analysis using spectre, like what basically pss, PAC means. Very basic on these topics. Thanks in adavance. Prakash
In Cadence 5.141, directly PAE may be used in pss analysis.Otherwise, Each input and output should have curent probe to measure the currents and of course with node voltages PAE and other important parameters can be simulated. But better way is to ADS or RFDE, because in these simulators, to simulate some important parameters is easier by inse
Hi, I am trying to simulate Mixer with Qpss analysis to view the harmonics and their distortions. Typically I was doing it with pss and it is taking long time for simulation. As Qpss has less time to simulate I am trying tht but encountered a prblem as error which spectre reports as follows. "Error (...)
Excuse me , How do u apply two tone in Hspice , In spectre , it is easy to simulatr the IM3 , You can use pss or Using two tone (Vsin) , Then Using FFT to check the two tone . Example : 49M , 50M , check the two tone . The fft base is 1M .. Thanks
in pss, the beat frequency should be accuracy and also need a large harmonic sideband number. When you display the result make sure you look at the right harmonic for the fundament frequency. You can reference the manual : spectre RF user guide , there is a detail simulation case for LNA. Hope it helps
In spectreRF you can also use the pss analysis! look at the following link:
hello everybody,what di u mean by beat frequency in pss analysis in spectre,is it ur oscillator output frequency?also is a standalone analysis of the vco phase noise enough or u need to calculate the phase noise when the pll is a part of the system.i am unable to calculate phase noise of vco as a part of the pll system,cause (...)
I'd like to ask one question too. I'm using pss to estimate IIP3 of IF filter, but as every people meet, the 3rd-order curve in low-power area isn't correct. Anyway, in my case, this incorrectness occured up to the high power area that make me very hard to find the 3 dB/dB slope of the curve, compare to pss+PAC simulation. I have to set the numbe
Hi Guys: Can anyone help me out in explaining the way to obtain a tabulation table indicating the noise summary contributed by each transistor in Cadence. I used pss and PNOISE analysis in Cadence RF-spectre to obtain the noise figure at 100kHz (flicker noise). I had also attached an example of the desired table. Thanks in advance Rgds
You cannot use normal hpsice noise analysis since it does not account for noise folding effect and thus cannot be used to simulate noise in SC circuits. Use pss then Pnoise in spectre instead.
Go to options at pss analysis panel and there is place called "Accuracy ....." and you can set the iteratio and the one below it to 5 and then try it. Good Luck!
I'm simulating an LNA and pss fails on me. The simulator settings are default ones. I have heard for pss one has to change the tolerance settings. I don't know how and which setting. pls help. Here's the error: Internal error found in spectre during periodic steady state analysis (...)


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