Hello Cadence Support,
Could you please tell me how to perform a post-trim simulation on an oscillator circuit?
Specifically, post-trim simulation on an oscillator involves:
1) Finding an optimal trimming code for the oscillator circuit, process corner by process corner.
2) Running a simulation with the optimal trimming code process corner by process corner.
I have already read and tried the following Rapid Adoption Kits:
Techniques for Simulating Calibrated Circuits with Virtuoso ADE Assembler (cadence.com),
where an optimal trimming code found in "calibration" (DC simulation test) is passed to the next test, "main_test". Thus, the example used in the RAK above can run the "main_test" with optimal trimming code for each process corner.
I would like to extend the similar simulations with calibration (trimming) plus post-trim simulation for an oscillator circuit. However, in an oscillator simulation, one simulation (one transient analysis) cannot find an optimal trimming code, unlike the example used in the RAK, where one DC simulation can find the optimal trimming code. Instead, even just for calibration, multiple simulations are needed to calibrate (trim) and find the optimal trimming code in an oscillator simulation.
In this case, are there any ways how to
1) Automatically find the optimal trimming code among the multiple transient simulations for calibration sweeping one parameter.
2) Pass the optimal trimming code found among the multiple transient simulations for calibration to a final simulation.
by extending the method described in the RAK document above?
Best regards,
Yoshi