Hi,

I have used noise sim for a while and just start to use pnoise.  I tried on a simple RC with vsin source (they are all series) and measure the noise across capacitor.  The result are all different.  The following is the testbench simulation condition and result.  My question is noise sim result is different from pnoise sim at low freq noise (for ex. at 10Hz).  When freq_vsin>>freq_rc, ponise_timedomain is close to noise sim.  When freq_vsin<<freq_rc, ponise_source is close to  noise sim.  Can any expert explain to me this question.
Thank you very much
BR,
Wayne


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R1=5kOhms
C1=1, 10000pF
Vsin=1MHz, amp=1v

* Noise sim
- sweep freq=1~100MHz
* PSS sim
- num. of harmonics=10
*pnoise sim
- realtive harmonic=1
- sweep freq=1~100MHz
- max. sideband=15
- noise type= source / timedomain


result at low freq noise (V2/Hz)
             noise_sim     pnoise_source   pnoise_timedomain
-------------------------------------------------------------------------
c1=10nf   83e-18           83e-23            83e-18
c1=1pf     83e-18           83e-18            2.3e-15