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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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  • BaaB

    Thank you.

    I tried to test the circuit below by using captab to measure the capacitance from node A to ground.

    What I expected is C1 + C2 (this is C1|| C2). However, the result from cabtab is only C2.

    The page doesn't allow me to attach an image now. I will post the image link of the picture below.

    The circuit is very simple VDD- C1 -C2 - GND. Where A is the point between C1 and C2 and C1 and C2 are in series.

    http://postimg.org/image/up31n9uup/

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  • BaaB

    Thank you.

    I tried to test the circuit below by using captab to measure the capacitance from node A to ground.

    What I expected is C1 + C2 (this is C1|| C2). However, the result from cabtab is only C2.

    The page doesn't allow me to attach an image now. I will post the image link of the picture below.

    The circuit is very simple VDD- C1 -C2 - GND. Where A is the point between C1 and C2 and C1 and C2 are in series.

    http://postimg.org/image/up31n9uup/

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