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 PSS/Transient Spectre/APS discrepancies 

Last post Tue, Aug 21 2012 7:27 PM by rohan kr. 2 replies.
Started by Steve Mikes 31 Jul 2012 02:16 PM. Topic has 2 replies.
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  • Tue, Jul 31 2012 2:16 PM

    PSS/Transient Spectre/APS discrepancies Reply

    I'm running a simple circuit with PSS. I decided to compare the results to Transient, and found that they differ by a significant amount. My output amplitude is 783mV with PSS(spectre), 772mV with Transient, and 754mV with PSS(APS). I ran the transient out for a long time to make sure a steady state was reached. How do I know which is these 3 is the correct answer?

    Thanks,

    Steve

    • Post Points: 35

  • Mon, Aug 6 2012 5:03 AM

    Re: PSS/Transient Spectre/APS discrepancies Reply

    Steve,

    Please log a service request with customer support so we can help you investigate.

    Andrew.

    • Post Points: 5

  • Tue, Aug 21 2012 7:27 PM

    • rohan kr
    • Not Ranked
    • Joined on Wed, Mar 28 2012
    • Posts 8
    • Points 100
    Re: PSS/Transient Spectre/APS discrepancies Reply
    I am facing the same problem with yours. I run PSS, SP transient analysis for my PA. At perfectly input/output matching condition, the gain of three cases should be approximately equal. But with transient simulation the gain is 5-6 dB lower than SP and PSS (SP and PSS results are correlated). When I change the integration method of transient simulation (gear, gear2, traponly, ...), the result also varies (output of PA varies from 150 mV ~ 700 mV). What simulation should be trusted? 
    • Post Points: 5
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Started by Steve Mikes at 31 Jul 2012 02:16 PM. Topic has 2 replies.