Tuesday, September 2, 2014
Audio Rejection filter Circuit
This narrow band filter using the 741 operational amplifier can provide up to 60 dB of rejection. With resistors equal to 100 K and capacitors equal to 320 pF, the schema will reject 50 Hz. Frequencies within the range 1 Hz to 10 kHz may be rejected by selecting components in accordance with the formula. To obtain rejections better than 40 dB, resistors should be matched to 0% and capacitors to 1%.
Audio Rejection filter Circuit Diagram
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