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1_kHz_N_PATH_NOTCH_FILTER

2017-02-21 22:12  
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1_kHz_N_PATH_NOTCH_FILTER
Combination of DG508 eight-channel CMOS multiplexer with low-pass and bandpass active filters provides 1-kHZ notch filter having Q of 1330 and 3-dB bandwidth of 0.75 Hz at 1 kHz. Low-pass filter introduces 180° phase shift at 1 kHz. Amplifier sums original signal in phase-shifted bandpass output from N-path filter, canceling 1-kHz components in original signal to produce desired notch characteristic.-″Analog Switches and Their Applications, SiIiconix. Santa Clara,GA,1976,p5-18-5-20.