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 Plotting the Phase Noise: *Error* quotient: can't handle (nil / 1.414214) 

Last post Tue, Jul 29 2014 2:15 AM by Andrew Beckett. 5 replies.
Started by Shaa 16 Jul 2014 05:36 AM. Topic has 5 replies and 444 views
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  • Wed, Jul 16 2014 5:36 AM

    • Shaa
    • Not Ranked
    • Joined on Tue, Apr 15 2014
    • Posts 8
    • Points 130
    Plotting the Phase Noise: *Error* quotient: can't handle (nil / 1.414214) Reply

    Hello friends

    I have simulated a VCO and I would like to plot phase noise after pss+pnoise simulation. But I face to this error:

     *Error* quotient: can't handle (nil / 1.414214)

    Could somebody help me?

    Thanks in advance

    Shaa

    • Post Points: 20
  • Wed, Jul 16 2014 8:00 AM

    Re: Plotting the Phase Noise: *Error* quotient: can't handle (nil / 1.414214) Reply

    Shaa,

    Not really enough info to go on. Which version are you using (of the IC tools and spectre). For IC do Help->About and note the subversion, and the simulator subversion will be in the simulator output log.

    Do you have any unusual characters in the net names you're measuring the output at? Perhaps you can post a picture of the form and also show the analysis statements from the netlist (i.e. everything from the options statement to the end of the input.scs)?

    Regards,

    Andrew.

    • Post Points: 20
  • Wed, Jul 16 2014 9:24 AM

    • Shaa
    • Not Ranked
    • Joined on Tue, Apr 15 2014
    • Posts 8
    • Points 130
    Re: Plotting the Phase Noise: *Error* quotient: can't handle (nil / 1.414214) Reply

    Andrew,

    I have changed output name from 'Vout+' to 'Vout1' and there is no problem more.

    Thanks,

    Shaa

    • Post Points: 20
  • Wed, Jul 16 2014 3:38 PM

    Re: Plotting the Phase Noise: *Error* quotient: can't handle (nil / 1.414214) Reply

    Which IC version are you using? I thought this was fixed years ago...

    Regards,

    Andrew 

    • Post Points: 20
  • Thu, Jul 17 2014 7:15 AM

    • Shaa
    • Not Ranked
    • Joined on Tue, Apr 15 2014
    • Posts 8
    • Points 130
    Re: Plotting the Phase Noise: *Error* quotient: can't handle (nil / 1.414214) Reply

     Version IC6.1.5.500.13

    Regards,

    Shaahin

     

    • Post Points: 20
  • Tue, Jul 29 2014 2:15 AM

    Re: Plotting the Phase Noise: *Error* quotient: can't handle (nil / 1.414214) Reply

    Hi Shaahin,

    I tried this (with output nodes Vout+ and Vout-) in IC615 ISR17 and IC616 ISR7 (the two versions I happen to have locally installed, as I'm not in the office at the moment), and both worked OK, when using the direct plot form - either with the newer pn('pnoise) expression or the older phaseNoise(1 "pss_fd" ?result "pnoise") expression.

    So I can only imagine it was broken around the subversion you were using (we did change from the direct plot using phaseNoise to pn in around 6.1.5.500.12 - so that's the most likely explanation for this having broken as I thought it was fixed years ago).

    Regards,

    Andrew.

     

    • Post Points: 5
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Started by Shaa at 16 Jul 2014 05:36 AM. Topic has 5 replies.