RC Low-pass Filter

This is a RC low-pass filter. Use this equations to calculate the Transfer Function for filter at a given frequency or values of R and C.

>> Calculate the transfer function for the filter with R and C values.

>> Calculate the R and C values for the filter at a given frequency.

Note : Use R as Ohms (Ω) and C as farads (F), then Fc will be hertz (Hz).

See below for frequency response of above filter that designed for 20KHz  cutoff frequency.

R = 820Ω
C = 0.01uF

Cut-off frequency     fc = 19409.1394015Hz  = 20KHz