Signal cancelling circuit

Details Signal cancelling circuit Signal cancelling circuit

1976-12-22

1978-06-06

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328151, 307251, 307304, 307353, G11C 2702, H04B 1504

Patent

active

040939235

ABSTRACT:
A system for cancelling an unwanted or noise signal having a constant frequency, amplitude and phase while preserving a desired signal having the same frequency but a different phase. The system samples the noise signal N times each cycle and stores the sampled values of the signal. The sampling is terminated and the stored signals feedback at the sample rate with reversed polarity to cancel the noise signal.

REFERENCES:
patent: 3504194 (1970-03-01), Eastman et al.
patent: 3564287 (1971-02-01), Todd
patent: 3659086 (1972-04-01), Metcalf
patent: 3795877 (1974-03-01), Poole
patent: 4004238 (1977-01-01), Wichmann

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