analog2000
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Hello, I have a switched cap 4th order low pass filter which is differential in nature. I can do transient/pss/pxf simulations without any problem on a netlist generated from a schematic. However, I do not see any meaningful outputs when I try to simulate the same circuit using layout extracted parasitics (R+C).
The # of nodes is 31174, # of bsim3v3 is 2881, bourse_1 is 755, capacitors is 50100, resistors are 40022. With this size netlist, the transients and the pss simulations do not start properly. The opamp outputs hit the rails, the moment the clocks start.
I read spectre.ic from readic menu, I use +parasitics and +csfe to minimize the # of parasitics.
Any help will be greatly appreciated
thanks analog2000
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