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REJECTION_FILTER

2017-02-18 05:47  
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REJECTION_FILTER
Circuit Notes This narrowband 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 circuit will reject 50 Hz. Frequencies within the 1 Hz to 10 kHz may be rejected by selecting components h accordance with the formula∶F=1/2πRCTo obtain rejections better than 40 dB,reslstors should be matched to 0.1%and capacitors to 1%.