To address the challenges associated with inadequate pulse signal amplitude and susceptibility to interference,this paper presents the design of a high-purity pulse signal processing circuit.Firstly,employing a rail-to-rail,full-swing 20 dB amplifier,the signal is pre-amplified and subsequently re-amplified to facilitate optimal processing amplitude.Secondly,a notch filter,based on the UAF42,is utilized to eliminate power frequency interference within the power system.Finally,an eighth-order Butterworth low-pass filter is designed for pulse signal processing,utilizing a Sallen-Key topology to minimize the number of circuit components.The test results demonstrate that the processing circuit effectively suppresses power frequency interference,with an adjustable center frequency of±0.5 Hz.Furthermore,the Butterworth low-pass filter effectively removes high-frequency noise without compromising the integrity of the original signal,thereby enhancing both the hardware amplification and purification of pulse signals.
维普
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