Equal component Butterworth active low pass filter calculator

App description

Enter the cutoff frequency value, any resistor or capacitor value, any resistor Rc or resistor Rd, click Calculate. The result will be displayed.

R_a = resistance in the filter

R_b = resistance in the filter

(R_a = R_b)

C_a = filter capacitor

C_b = filter capacitor

(C_a = C_b)

R_c = feedback resistor

R_d = feedback resistor

Usage example

Input data: cutoff frequency: 100KHz

Click on "Calculate"

Output Data:

Resistance (R_a = R_b): 10Kohm

Capacitor (C_a = C_b): 0.159nF

Resistor R_c:10Kohm

Resistor R_d: 5.85Kohm

Note

Enter any value arbitrarily - resistor or capacitor

Any value - resistor R_c or resistor R_d