The filter circuits of AktivFilter 3

The following filter circuits can be designed by AktivFilter 3. The pictures show only one stage of a filter, because any stage of a filter has the same circuit (but different component values):

Lowpass with multiple feedback, order 1..30:

Lowpass with multiple feedback

Lowpass with Sallen-Key-circuit, gain 0 dB, order 1..30:

Lowpass with Sallen-Key-circuit, gain 0 dB

Lowpass with Sallen-Key-circuit, gain >0 dB, order 1..30:

Lowpass with Sallen-Key-circuit, gain >0 dB

Highpass with multiple feedback, order 1..30:

Highpass with multiple feedback

Highpass with Sallen-Key-circuit, gain 0 dB, order 1..30:

Highpass with Sallen-Key-circuit, gain 0 dB

Highpass with Sallen-Key-circuit, gain >0 dB, order 1..30:

Highpass with Sallen-Key-circuit, gain >0 dB

Bandpass with multiple feedback, order 2..30:

Bandpass with multiple feedback

Bandreject with twin-T, order 2:

Bandreject with twin-T

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