xwcwc1234
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TAIWAN
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I use BSIM3V3 model form foundry and there is no behavioral model in my circuit . In my circuit , since it is a PWM circuit , so there are a couple of big NMOS/PMOS transistors at output side . I also put a LC low pass filter (L=33uH ,C=1uF) to filter out the PWM output . Hspice diagnostic for nonconvergent are show as follows ;
node subcircuit old new error name definition voltage voltage tolerance (xt.sp) t89 -7.996k -6.996k 125.065 (xt.xi228.pdrive) out_blk 5.363 5.343 3.748 (xt.r101:i1) t89 -7.996k -6.996k 125.065
total voltage source power dissipation= -18.5695 watts
So what can I do for solving this problem ?
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