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parasitic capacitance

Posted 31.01.2013, 02:28 GMT-5 Low-Frequency Electromagnetics Version 4.2a 1 Reply

Sunil Chaluvaiah
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hi,
i m designing a capacitive comb drive accelerometer in this i want to take parasitic capacitance in to account in order to find capacitance but i cant find where it is...could you please help me out
1 Reply Last Post 31.01.2013, 04:19 GMT-5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 31.01.2013, 04:19 GMT-5
Hi

but how can COMSOL decide what is "nominal" and what is "parasitic" capacitance ? you need to define your surfaces for the "nominal" value and integrate, and then look at the ratio with the full capacitance given by COMSOL. Check the internal equations to see how COMSOL estimates the capacitance, or read some of the model library examples

--
Good luck
Ivar
Hi but how can COMSOL decide what is "nominal" and what is "parasitic" capacitance ? you need to define your surfaces for the "nominal" value and integrate, and then look at the ratio with the full capacitance given by COMSOL. Check the internal equations to see how COMSOL estimates the capacitance, or read some of the model library examples -- Good luck Ivar

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