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2007-06-28 08:13:07 · 2 answers · asked by kells_2010 1 in Science & Mathematics Engineering

I'm creating and measuring the resistance and capacitance of an RC circuit using only PSPICE. I want to compute the calculations by hand before I use PSPICE to simulate it to make sure its accurate. I'm not sure how the find the charge of the capacitor inorder to find the resistance by pluging it into the capacitance equation.

2007-06-28 08:30:57 · update #1

2 answers

Charge = capacitance * voltage.

Plot the voltage across the capacitor (transient analysis), then setup a function to plot C * V

Example: C1 is 50 UF
The formula would be: 50E-6 * V(C1)

.

2007-06-28 08:30:03 · answer #1 · answered by tlbs101 7 · 1 0

as far as i know, in pspice, you specify your own capacitor value, then the software simulates with it. and when simulating, pspice sees your set values as constants, and caculate resulting current and voltage, then it varies the resulting values a little to simulate noise, transmission lost and such. this is what i learned from using pspice to do circuit analysis. maybe that's what you are doing too? please specify. but if you are just looking for the capacitance from a circuit diagram, you don't even need to use pspice, just do hand circuit analysis, or take your capacitor to a capacitance meter

2007-06-28 08:22:35 · answer #2 · answered by Chuck Schwarzenegger 2 · 0 0

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