## Calculate Active Low Pass Filter ## Active filter design precautions

When building the active filter circuit, high tolerance components must be used to obtain the best performance. Typically they should be 1% or better.

A further item to ensure the optimum operation of the circuit is to ensure that the source impedance is less than about 100 ohms. Additionally the load impedance should be greater than about 2 M Ohms.

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## Calculated Values

 Filter Type : Butterworth Chebyshev 0.1 dB Bessel Resistors : kΩ 3dB Cutoff Freq : kHz
 R1, R2 = kΩ C1 = uF nF C2 = uF nF <<< Back to Lowpass, Bandpass and Highpass Filter Calculators

## Calculated Values

 Filter Type : Butterworth Chebyshev 0.1 dB Bessel Resistor R1 : kΩ 3dB Cutoff Freq : kHz Voltage Gain :
 R1 = kΩ R2 = kΩ R3 = kΩ C1 = uF nF C2 = uF nF Amplification = dB <<< Back to Lowpass, Bandpass and Highpass Filter Calculators

## Calculated Values

 Filter Type : Butterworth Chebyshev 0.1 dB Bessel Resistors : kΩ 3dB Cutoff Freq : kHz
 R1, R2, R3 = kΩ C1 = uF nF C2 = uF nF C3 = uF nF <<< Back to Lowpass, Bandpass and Highpass Filter Calculators 