Electrical – What could be the reason Micro-Cap is showing very different current from LTspice for this circuit

spice

I just try Micro-Cap SPICE simulator and trying to check it with LTspice.

I'm simulating this MOSFET in LTspice with 10Hz 12V gate voltage and the gate current due to MOSFET capacitance peak to 200mA as in the following plot:

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When I simulate the exact circuit in Micro-Cap the voltages are the same but the gate current is not how it is in LTspice not even close. Here is the setup in Micro-Cap:

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As you see the bottom green plot shows the gate current which is like noise:

enter image description here

What could be the reason I'm getting very different gate current wave-forms?

Best Answer

You probably also need to make the minimum time step smaller in microcap

In Transient analysis window the Maximum time step was set to zero, I changed it to 1u now I can see peaking currents although not exactly the same but similar behaviour. So you were right it was about time step.

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