tulip
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my circuit is a high frequency mixer(LO:1.5G, RF: 1.3G) circuit.
when simulated with transient analysis, spectre report " convergnence difficulties resulted in error requirements being unsatisfied." "zero diagonal found in Jacobian at 'I0.I51.C0.1" and 'I0._net3",
I tried serveral methods, such as using gears method, set gmin to 1e-18, set cmin to 1f, and set the maxstep, but convergence difficulties still exit.
How can I slove this problem?
many thanks! :)
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