248 Threads found on edaboard.com: Spectrerf
I have a problem in convergence of a circuit consists of an oscillator locked to the frequency of voltage source. I use tstab with enough values with no progress. My accuracy is "conservative".
The waveform (of both steady stare and tstab) comes at the output , but non-convergence warning comes too!
Have a look at the picture attached.
Analog Circuit Design :: 04-03-2016 15:36 :: mysterious_man :: Replies: 0 :: Views: 580
I use spectrerf.
the results that I showed is the result of transient analysis.
what do you mean by steady state analysis please?
Analog Circuit Design :: 10-26-2015 16:21 :: hanikapa :: Replies: 21 :: Views: 2012
Going to use Cadence spectrerf to check DCDC buck converter AC characteristic (gain margin, phase margin, crossover frequency).
Any reference? or Tutorial to use spectrerf for DCDC?
I think I have to use PAC (periodic AC) analysis in spectrerf analysis setting but I have no idea how to create DCDC testbench and also set analysis (...)
Analog Circuit Design :: 09-01-2015 08:33 :: vleam13 :: Replies: 0 :: Views: 598
I am using HB analysis in spectrerf to design a kind of mixer.
To do effective HB analysis, I use Transient-Aided Option>Run transient>Decide Automatically.
However, I can't find 'Decide Automatically' option as below.
Please, let me know what's wrong.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 02-22-2015 04:50 :: fetmodel :: Replies: 1 :: Views: 718
You can find design workshop for mixer at spectrerf manual in MMSIM folder or just by clicking on "help" button in cadence virtuoso. In this workshop you'll find information about simulation key parameters of mixer/lna/vco.
RF, Microwave, Antennas and Optics :: 01-19-2015 07:55 :: sarge :: Replies: 1 :: Views: 778
... I get a list of input sidebands and output sidebands. ... What are input sidebands?
I think these are just back-computed input frequencies due to the output sidebands. At least I found a hint about this in the spectrerf Simulation Option User Guide: 113190
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 01-14-2015 17:48 :: erikl :: Replies: 2 :: Views: 957
I use tsmc18 RF model to model my NMOS. The RF model of the NMOS itself is a sub-circuit.
When I run pss with spectrerf, it showed warning for the NMOS: "M0: Missing bulk-source diode would be forward biased", but I actually tied bulk and source together and they are tied to ground.
I run transient and probe the voltage of bulk and sou
Analog Circuit Design :: 01-07-2015 14:06 :: teem :: Replies: 0 :: Views: 532
If I do SP analysis in spectrerf for a frequency range, how can I get its equivalent series R,L,C and parallel R,L,C?
Is there any suggested fundamental book I can refer?
RF, Microwave, Antennas and Optics :: 12-24-2014 07:59 :: teem :: Replies: 1 :: Views: 917
You should do a PSS analysis first to determine the frequency of oscillation then PNOISE to get Phase Noise at offset frequencies.
But you should refer to spectrerf User Guide for more explains the PSS+PNOISE analysis for oscillators in more detailed.
RF, Microwave, Antennas and Optics :: 06-01-2014 14:25 :: BigBoss :: Replies: 6 :: Views: 1494
in Cadence spectrerf, is there coupler model? or behavior model?
how about bi-directional coupler model?
if there does, please tell me where to find that!
Electromagnetic Design and Simulation :: 04-16-2014 07:04 :: karaisan :: Replies: 0 :: Views: 561
i need your help,here is my question:i want to use PXF analysis of spectrerf simulator to evaluate the power noise effect on the phase noise of VCO output.but i cannot get the waveform.
my PSS setting is like this:
.beat freq=400M //VCO output 426M
.number of harmonics =10
.accuracy default: moderate
Analog Circuit Design :: 12-18-2013 11:08 :: power_pwer :: Replies: 0 :: Views: 555
I am trying to simulate RF power amplifier using Cadence. There is a guide file entitled "spectrerf Workshop Power Amplifier Design Using spectrerf MMSIM61". I want to follow the tutorial but the problem is that there is only block diagrams not detailed schematic.
Could anyone tell me where can I find the detailed schematic for RF power ampli
RF, Microwave, Antennas and Optics :: 08-20-2013 09:11 :: Osawa_Odessa :: Replies: 1 :: Views: 596
How to generate a ramp voltage in Cadence spectrerf (or AMS)? I am designing a compartor and need to give a ramp voltage at one of its inputs, the other input being a dc voltage. Can anyone suggest me ideas to generate a ramp voltage.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 06-28-2013 02:55 :: Herang Sayo :: Replies: 1 :: Views: 2484
Not observing the suggestions for PSS analysis of oscillators in the spectrerf manual?
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-06-2013 15:43 :: FvM :: Replies: 4 :: Views: 832
I'm trying to simulate a power amplifier and find the load-pull contours. I've done the state setup and the design set up as the spectrerf manual says. The thing is, spectre can't seem to understand the portAdapter symbol. When trying to simulate the design, I get an error as shown in the picture below. The parameters that ar
RF, Microwave, Antennas and Optics :: 03-14-2013 20:22 :: guitar_man :: Replies: 1 :: Views: 476
I am simulating an amplifier (A simple one)
The amp is merely a differential pair with a tail current source and resistive load. Differential Input Differential output.
I placed 2 ports at the Gates of the Pair - each of them having first and second sinusoid amplitude set to pin in dBm
and swept pin in a swept PSS analysis
Analog Circuit Design :: 03-02-2013 18:04 :: Bellerophon :: Replies: 0 :: Views: 610
There are 3 frequencies in my circuit: frf = 1955MHz, LO1 = 1960MHz, and LO2 = 1950MHz.
I'm setting up a 2-tone HB analysis:
hb hb oversample = fundfreqs= maxharms =
When the simulation runs, it keeps telling me:
ERROR (SPCRTRF-15268): The source V63 couldn't find matched freq. Please make sure the fundfreqs
Analog Circuit Design :: 02-28-2013 18:18 :: bisonlj :: Replies: 0 :: Views: 535
I have tried a simple circuit to check the harmonic. However, the harmonic is observed for the input port. I have no idea for explain this. Very appreciate for you any help.
The following is the main flow in my work,
(1) Schematic: Only one capacitor 10 pf, Port 1 is set sin source with 50 ohms res, freq=900MHz,Power=30 dBm, Port 2 is set as DC
Elementary Electronic Questions :: 01-22-2013 13:39 :: ltzsl :: Replies: 0 :: Views: 715
What is the best option to create user-defined models for use in circuit design using Cadence Analog Design Environment/spectrerf?
RF, Microwave, Antennas and Optics :: 12-20-2012 16:48 :: Lathas :: Replies: 0 :: Views: 570
I have a /4 divider ahead of the mixer. I wanna know how to set the simulation station in spectrerf environment. Use QPSS or PSS? What's the value of fundamental frequency? Best thanks!
Electromagnetic Design and Simulation :: 12-05-2012 10:11 :: tigonzn :: Replies: 0 :: Views: 711