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ACTIVE_SECOND_ORDER_BANDPASS_FILTER_FOR_SPEECH_RANGE

2017-02-13 02:23  
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ACTIVE_SECOND_ORDER_BANDPASS_FILTER_FOR_SPEECH_RANGE
This filter circuit which uses LM1458 or similar op amp has a response of 300 Hz to 3.4 kHz with 12 dB/octave roll-off outside the pass band. Section A is the high-pass one, followed by Iow-pass sec-tion B. Values of either section can be scaled to alter the pass band.