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Hi, Tony, thanks for your reply so far and I finally figured out the reason why I got this plot. It may be caused by the simulator (Spectre) or the PDK I used rather than the circuit design.
The simulation I did these days is measuring the common-mode feedback performance of an Op-amp in a...
Hi Tony
I got this plot from Virtuoso, and the phase at low frequency is not exactly 0 degree because I simplified it to make the plot clear.
Apart from that, I suppose no matter what this waveform stands for(actually I plotted it by stb. sim and got the phase), we should focus on the phase...
Hello everyone
When I did analog design recently, I got a frequency response of a system like this(I have slightly simplified the plot):
The phase margin and gain margin printed by the Virtuoso are 80 degrees and 10 dB.
What I'm confused is:
- based on the theory I have learnt, the phase has...
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