Fillter circuits

(2nd Order Opamp Filters,Band pass,high pass,low pass fillter)
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2nd Order Opamp Filters
Basic 2nd Order Opamp Filters
(09-Sep-2005)---59

Multiple Feedback Bandpass Filter
This is the basis of an expandable equaliser and analyser or vocoder
(11-Sep-2005)---226

Single Op-Amp Bandpass Filter
Single Op-Amp Bandpass Filter
(09-Sep-2005)---58

Subsonic/ Rumble Filter
A 36dB/octave 17 Hz high pass filter to remove ultra low frequencies
(11-Sep-2005)---260