Circuit for reconstructing noise-affected signals

Details Circuit for reconstructing noise-affected signals Circuit for reconstructing noise-affected signals

1983-07-21

1986-12-02

Miller, Stanley D.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

328151, 328163, 328149, 328 21, 455304, H03B 100, H03B 104, H03K 500

Patent

active

046267883

ABSTRACT:
An analog signal which is affected by impulse noise is applied to a timing circuit that generates a sampling pulse in response to a noise impulse introduced in the desired signal. This noise-affected signal is also applied to a holding circuit which passes it in the absence of the sampling pulse and holds it in the presence of the sampling pulse to derive therefrom a modified analog signal. A differentiator generates a signal representative of the time-varying rate of the analog signal. A sampling circuit samples the rate representative signal in response to the sampling pulse and holds the sampled signal for the duration of the sampling pulse to derive therefrom a rectangular pulse, so that the amplitude and polarity of the rectangular pulse represent the gradient and polarity of the noise-affected portion of the signal. The rectangular pulse is integrated linearly at a rate variable as a function of the amplitude of the rectangular pulse to generate a ramp voltage. An adder combines the ramp voltage with the modified signal to generate a reconstructed signal.

REFERENCES:
patent: 3689845 (1972-09-01), Hepp
patent: 4076969 (1983-07-01), Sacks
patent: 4143333 (1979-03-01), Jacobsen et al.
patent: 4156202 (1979-05-01), Takahashi
patent: 4192003 (1980-03-01), Brock et al.
patent: 4204170 (1980-05-01), Kage
patent: 4220926 (1980-09-01), Buckner
patent: 4311963 (1982-01-01), Watanabe
patent: 4314377 (1982-02-01), Kondo et al.

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