Beginners help with Filters

[dawn444]

Hi

Could anyone give me some advice on a RC high pass filter calculation.
Is it possible to calculate the voltage gain with just the following information available, angular frequency = 1/10us.

Thanks in advance

 

[VisiGoth]

Yes. The gain is greater than zero. If you want a more detailed anwer or help with your understanding, please provide what the application is and how the HPF and the details of the componenet values fit into the problem.

 

[Skogsgurra]

If you say RC high pass, then I assume that you have a single pole (one C and one R). Further, I assume that the frequency is 1/(10 us) even if you say 1/10 us (which would be 0.1 microseconds).

So, with these assumptions, your corner angular frequency is 100 000 rad/sec. That is equivalent to 100/(2*PI) or 15.9 kHz. The gain at 0 Hz is 0, at f0 the gain is 1/sqrt(2) and increases up to 1 when frequency is increased.

Google RC filter for detailed information.

I hope that this isn't a school question. But, if it is, I held back the central information, the formula for calculating the gain.

Gunnar Englund

http://www.gke.org

 

[Warpspeed]

But just remember the associated amplifier also has a high frequency rolloff which may significantly effect the results.

In truth an active rc highpass filter will always end up having a bandpass filter characteristic.