Hello,
I encountered the following problem using cadence virtuoso IC6.1.8 ISR3 with SPECTRE 18.1 ISR6.
I did an stb analysis with a global variable sweep ("temperature" and "L"). Furthermore, I created several expressions for dc gain, phase margin and so on. The expressions are evaluated fine inside assembler. If I now right click on one evaluated expression for the phase margin and select "Plot All" I get the depicted window in VIVA - but the values do not match the expression results in assembler (They are somehow mirrored regarding the sweep variable "L").
Nevertheless, if I mark multiple phase margin results in assembler and click on "Plot" I get the correct results. I also attached a picture from that at the end.
This behaviour does not happen always, but it occurred several times to me.
Regards,
Michael
Wrong plotting
correct plotting