I'm running IC22.214.171.124 and trying to run a transient noise simulation on an amplifier but can't seem to get the noise generation to work. I've simplified the test bench to an ideal current source feeding into a 1kohm resistor to verify basic functionality. No noise was generated. I've done all the basics - turned noise generation ON within the resistor settings, followed the user manual instructions on setting up the transient noise test parameters (fmin, fmax, noise contribution ON, update at fmax, selected the resistor). I've verified that this test bench does work with AC noise analysis. Am I missing something here?
Thanks in advanced for your help.
No idea what you're doing that is causing this not to work. I did the same thing, and in the netlist, I get:
// Generated for: spectre// Generated on: Jun 10 17:34:46 2013// Design library name: mylib// Design cell name: trannoise// Design view name: schematicsimulator lang=spectreglobal 0// Library name: mylib// Cell name: trannoise// View name: schematicR0 (op 0) resistor r=1KI0 (op 0) isource dc=100u type=dcsimulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=27 \ tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5 \ digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output" \ checklimitdest=psf tran tran stop=1m noisefmax=1G noisefmin=1k noiseseed=1 noiseupdate=fmax \ noiseon=[ R0] write="spectre.ic" writefinal="spectre.fc" \ annotate=status maxiters=5 finalTimeOP info what=oppoint where=rawfilemodelParameter info what=models where=rawfileelement info what=inst where=rawfileoutputParameter info what=output where=rawfiledesignParamVals info what=parameters where=rawfileprimitives info what=primitives where=rawfilesubckts info what=subckts where=rawfilesaveOptions options save=allpub
Note I don't really need to set noiseupdate or the noiseon parameter; it just works OK without this.
If I plot the voltage at node op, I get the attached graph.