a series capacitor and a shunt resistor means a high pass filter, a shunt capacitor and a series resistor means a loss pass filter. kapag nacombine na yang dalawa pwede ka makagawa ng bandpass filter or notch filter. One basic formula for the cut off frequency is fc=1/2pi R C
fc= cutoff frequency
R= value of resistor
C= Value of capacitor
kung ikaw ay ECE dapat alam mo yan.