How do I set the initial current condition for an inductor in Transient analysis?
Spice does not allow this directly unless you also set the initial voltages for all the circuit nodes. 5Spice does not support this option. In some circuits you can force the initial inductor current by using a voltage controlled switch and series resistor connected from one end of the inductor to ground or power. Connect the switch’s control inputs to a separate Signal Source which is set for the STEP waveform. The STEP waveform’s amplitude is zero at TIME=0 and non-zero for Time > 0. Set the switch’s threshold so it will be closed at TIME=0, conducting the initial current, then open when TIME > 0.
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