Equal Component Butterworth High Pass Filter Calculator

Enter value of Cutoff Frequency, any one value - Resistor or Capacitor, any one value - Resistor Rc or Resistor Rd and click on calculate. Result will be displayed.


Ra = Filter Resistor
Rb = Filter Resistor
(Ra = Rb)
Ca = Filter Capacitor
Cb = Filter Capacitor
(Ca = Cb)
Rc = Feedback Resistor
Rd = Feedback Resistor

Cutoff Frequency:

(Enter any one value - Resistor or Capacitor and
any one value - Resistor Rc or Resistor Rd)

Resistor (Ra = Rb):
Capacitor (Ca = Cb):
Resistor Rc:
Resistor Rd:

An Equal Component Butterworth High Pass Filter Calculator is a tool used to design a high-pass Butterworth filter where all resistors and capacitors have the same values, making implementation easier. This type of filter has a maximally flat frequency response, meaning no ripples in the passband, and effectively attenuates low-frequency signals.

Key Features:
Equal Component Design: Resistors and capacitors have identical values.
Butterworth Response: Provides a smooth transition without ripples.
Cutoff Frequency (fc): The frequency where the output reaches -3 dB.
Order (N): The number of reactive components that determine the filter's sharpness.
Formula for Component Calculation:
For a second-order equal-component Butterworth high-pass filter:

Resistor value (R):

Capacitor value (C):
Choose a standard capacitor value and calculate R accordingly.
Usage:
Input the desired cutoff frequency (fc).
Select a convenient capacitor value (C).
The calculator determines the resistor value (R).