A band pass filter could be a 2 nd order filter or of higher order since a minimum of two resistor and capacitor is needed for proper functioning of the circuit. Now, when an input signal frequency is supplied to this filter it outputs a frequency which is higher than fc LOW and lower than fc HIGH.. This is the circuit diagram of the RC passive bandpass filter. Band Pass Filter The cascading or the combination of high pass filter and low pass filter forms a bandpass filter as it allows a particular band of frequencies and will attenuate the signals which are higher and lower than cut off frequencies.
![[DIAGRAM] Rc Bandpass Filter Circuit Diagram](http://www.seekic.com/uploadfile/ic-circuit/20096162456954.gif "[DIAGRAM] Rc Bandpass Filter Circuit Diagram")
The above figure shows the Band pass filter circuit. The input given is a sinusoidal signal. The properties of low pass and high pass combinations give us Band pass filter. By arranging one set of RC elements in series and another set of RC elements in parallel the circuit behaves like a band pass filter.. The circuit diagram of the passive RC band pass filter is as shown in the below figure. Circuit Diagram of Band Pass Filter. The first half of the circuit represents a passive RC high pass filter, allowing signals above the lower cutoff frequency (fc-low) and attenuating those below it.