White Nosie Generator Circuit of Shift Register and Exclusive-OR Gate

Published:2011/7/9 22:28:00 Author:Michel | Keyword: Shift Register, Exclusive-OR Gate, White Nosie, Generator Circuit | From:SeekIC

The picture is the white noise generator circuit of shift register and exclusive-or gate.R1 and C1 constitute differential circuit and the circuit enters work state when the switch is turned on.R2, R3 and G3 constitute schmidt trigger circuit.Feet 13 output voltgae of 74HC164(4) is binary signal and the low pass filter composed of L1, C5 and C7 makes amplitude probability density function become normal distribution white noise,namely,Gaussian noise.The cut-off frequency of the low pass filter is enough lower than clock frequency (about 3 MHZ).RP1 is used to adjust and outputs U PWL.



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