### Author Topic: PCB paristic capacitance  (Read 6626 times)

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#### john23

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##### PCB paristic capacitance
« on: February 26, 2024, 02:09:03 pm »
Hello, given the pcb shown below, how do i know from the route from 1 to 2 what parasitic capacitance i will get into the input of the opamp located at point 2?
Thanks.

#### iMo

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##### Re: PCB paristic capacitance
« Reply #1 on: February 26, 2024, 02:21:30 pm »
You may a) calculate that (you have got all the data needed), or, b) your PCB design tool tells you that.
a) is a quite difficult exercise, b) would cost you an arm and a leg..

#### metebalci

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##### Re: PCB paristic capacitance
« Reply #2 on: February 26, 2024, 03:00:47 pm »
You may a) calculate that (you have got all the data needed), or, b) your PCB design tool tells you that.
a) is a quite difficult exercise, b) would cost you an arm and a leg..

What is the solution for (b) ? an EM solver or something else

#### metebalci

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##### Re: PCB paristic capacitance
« Reply #3 on: February 26, 2024, 05:09:57 pm »
Hello, given the pcb shown below, how do i know from the route from 1 to 2 what parasitic capacitance i will get into the input of the opamp located at point 2?
Thanks.

Does the PCB have two layers ?

#### john23

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##### Re: PCB paristic capacitance
« Reply #4 on: February 26, 2024, 06:53:06 pm »
yes two layers.

#### Andree Henkel

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##### Re: PCB paristic capacitance
« Reply #5 on: February 27, 2024, 08:52:31 am »
given you would know the answer, what would you use it for?

Smf