I was following the "Simulating Switched-Capacitor
Filters with SpectreRF" tutorial/paper and tried to replicate some of the simple S&H results.
So I'm using Virtuoso 6.1.6 (which is quite old AFAIK).
Below is the testbench I've used (Clock frequency is 1 MHz):
I've set the PAC analysis to be "sampled" at 750 ns (which is the middle of the "hold" time), below are the results for the net "out":
I have expected the sampled pac result to show the sinc() behaviour as well as shown in figure 6, in tutorial (https://designers-guide.org/analysis/sc-filters.pdf
What's going on with the sampled pac anaylsis ?
Another question - with regards to this simple sample and hold circuit, what is the meaning of all the harmonics of the "regular" continuous time PAC analysis ?
Thanks in advance,