Re: How a resistance is simulated in switch capacitor filter?

Date: Fri Nov 10 10:49:23 2000
Posted By: Steve Taylor, Professional Engineer
Area of science: Engineering
ID: 971424954.Eg

Message:


Easy, and a grad student can't work this out ???

For a capacitor charge Q= capacitance C  times voltage between the plates V

Q=CV
Let F be the frequency of the switch. I is current. 
Then if charge Q flows in time 1/f then I (dq/dt) = fxCxV

And to a first approximation, since i/v= z then z=1/fc

Steve

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