Hello,
I am trying to simulate the input common mode range of my operational amplifier using Cadence Virtuoso and spectre ADE.
The simulation concept is to sweep the input common mode DC voltage (VIC) and run the AC simulation for every step to find the GBW and gain for every step of VIC.
To implement this principle, I run both AC and DC simulation in the same time. the AC simulation is to find the gain and GBW, while I use the DC simulation to sweep the VIC.
When I run it, the simulator is not doing it is suggested above, he only consider the default value of VIC and run the AC simulation one time. means he is not actually sweeping the DC. Why ?
I made a solution to avoid this problem by sweeping the VIC from parametric not by DC simulation and it is working properly. the only issue with parametric it consumes more time, thus I still wonder about the first setup
Thank you