ravigupta
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Posts: 3
Austin,Texas
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Hi .. I have been trying to plot the voltage gain of the LNA , but I get an error: "Convergence difficulties resulted in error requirements being unsatisfied" and so the simulation goes on indefinitely. From the cadence documentation I found that this might occur if there are multiple periodic stimuli and their stimulus frequencies are not co periodic (and multiple of PSS analysis period).But I just have one voltage source in my circuit.(the circuit is the same as page 289 of "The Design of Cmos RF Integrated circuits"by Thomas Lee"). Can anyone suggest what might be the cause of no convergence ? Also,a very fundamental question , does the PSS analysis period correspond to the fundamental frequency of the source we use ? Thanx, Ravi
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