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Is there a way to measure the equivalent capacitance from a node to ground in a circuit?

BaaB

Is there a way to measure the equivalent capacitance from a node to ground in a circuit?

I see that the node to ground in captab only reports the capacitance value of an actual capacitor (if exists) from that node to ground not the equivalent capacitance.

Thank you.

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  • Andrew Beckett

    As I said, I've never really thought about doing this - usually just knowing the actual capacitance has been enough. 

    I would expect that you could connect a source (maybe via a resistor) to the node where the voltage source steps between the bias voltage and a small increment above the bias voltage (in order to not cause a large-signal change in the bias condition). I've not tried doing this though... (and won't have time in the coming week to make this kind of experiment).

    Regards,

    Andrew.

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  • Andrew Beckett

    As I said, I've never really thought about doing this - usually just knowing the actual capacitance has been enough. 

    I would expect that you could connect a source (maybe via a resistor) to the node where the voltage source steps between the bias voltage and a small increment above the bias voltage (in order to not cause a large-signal change in the bias condition). I've not tried doing this though... (and won't have time in the coming week to make this kind of experiment).

    Regards,

    Andrew.

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