Discussion in 'Homework Help' started by skanes 1, Apr 8, 2009.
I need to find out the formula for the Vout of a high pass filter
Can any one help me out ?
The magnitude of the voltage out will have to do with that of the voltage in and frequency.
It will vary for various filters (ie. 1st order, second order etc...)
If you google high pass filter transfer function, you can find what it is you are looking for.
A high pass filter is simply running your output in series with a capacitor. The reason for this is that the impedance ("resistance") for a capacitor is:
Remember that ω = 2∏f. Therefore, the impedance of a capacitor goes extremely low as the frequency goes extremely high, thereby allowing high frequencies to pass through OK. If you have a low frequency, your impedance will be come extremely high, thereby "cutting off" your output.