Noise reduction in signal transmission system over building powe

Details Noise reduction in signal transmission system over building powe Noise reduction in signal transmission system over building powe

1982-10-27

1988-05-17

Caldwell, Sr., John W.

Communications: electrical

Systems

Selsyn type

375 99, H04M 1104

Patent

active

047453923

ABSTRACT:
A signal transmission system over building or house wiring includes noise reduction circuit to reduce noise including asynchronous noise and synchronous noise. Received pulses are sampled in a given interval and the number of continous pulses in question during the sampling interval is counted. The pulses in question are ignored as noise if the number of pulse counting is less than a predetermined reference count and the pulses are treated as true signals if the number is more than said reference count.

REFERENCES:
patent: 3523278 (1970-08-01), Hinkel
patent: 3855575 (1974-12-01), Leuschner
patent: 3879665 (1975-04-01), Carlow
patent: 4297533 (1981-10-01), Gander
patent: 4348657 (1982-09-01), Merkel
patent: 4414534 (1983-11-01), Whidden
patent: 4559520 (1985-12-01), Johnston
IBM Technical Disclosure Bulletin, Adams, vol. 17, No. 3, Aug. 1974, pp. 911-912.

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