Hi folks, I know that, in case of low pass filter, or high pass filter, the cut off frequency is equal to 1/2*pi*RC. So how about if I have a R and C in parallel? does it behave as a low pass filter? does it have the same freq? Thx, Thomas
>So how about if I have a R and C in parallel? does it behave as a low >pass filter? Without additional series element? No. Or is the input driven by a current source?
The voltage at the input and the voltage at the output are equal inthis circuit.
So if the R//C does not have any influence on the frequency, how about this circuit? How can we calculate the cut off freq of it? Thanks
In the last circuit both resistors must be calculated as parallel.