Noise removing circuit

Details Noise removing circuit Noise removing circuit

1992-07-10

1994-05-10

Calahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307353, 307529, 328151, 328165, H03K 508

Patent

active

053110870

ABSTRACT:
A noise removing circuit for removing an impulse noise in a signal. An input selector switch receives a first signal and a second signal to selectively output the first and second signals. A polyphase sampling pulse generator outputs polyphase pulse trains. A plurality of sample-and-hold circuits are in cascaded connection to sample and hold the output of the input selector switch. Each of the sample-and-hold circuits is activated by pulses of a corresponding phase of the polyphase pulse trains to sample and hold a signal level being held on a preceding circuit. Each of a plurality of multipliers has a predetermined multiplication coefficient and outputs the signal level on each of sample-and-hold circuits multiplied with said predetermined coefficient. An adder adds up the outputs of the plurality of multipliers to produce the second signal.

REFERENCES:
patent: 3792195 (1974-02-01), Wilson et al.
patent: 3812386 (1974-03-01), Porter
patent: 4282515 (1981-08-01), Patterson, III
patent: 4334195 (1982-06-01), Luce
patent: 4528678 (1985-07-01), Udren
patent: 4574390 (1986-03-01), Hirohashi et al.
patent: 4814714 (1989-03-01), Beadle
patent: 4958085 (1990-09-01), Hashimoto et al.

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