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Multisim matrix singular error while designing a Band Pass Filter

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syedhamzahasan

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Hello,

I am trying to test a simple BPF in multisim. But it is giving me "matrix singular error" and I can't seem to diagnose the problem.
Here is the circuit, help if possible.

New Bitmap Image - Copy.jpg
 

Insert a small resistance on the source side to solve the error.
 

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"matrix singular error"

This is a cryptic all-purpose error which the simulator displays to tell you it cannot decide the result of a particular step as it seeks to converge on a solution. In your case it apparently wants some ohmic resistance inline with the inductor and/or capacitor, so it can derive a time constant using a formula RxC or L/R.
 
I guess the issue is brought up by the perfect DC short between all circuit nodes during initial transient solution. Using inductors with a small default series resistance like Ltspice does avoids this trivial SPICE trapdoor.

Operating a lossless LC filter without any source or load impedance is unworldly and pretty useless, by the way.
 
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