Selective signal receiver for use in telecommunication systems

Details Selective signal receiver for use in telecommunication systems Selective signal receiver for use in telecommunication systems

1974-08-02

1976-01-27

Claffy, Kathleen H.

H04M 150

Patent

active

039353958

ABSTRACT:
A selective digital signal receiver is disclosed in which the time distances between zero crossings of the input voltages are measured with a counter which is controlled at a clock frequency higher than the signal frequency. Each measurement covers a predetermined number of cycles. The greater the number of cycles chosen, the less the bandwidth must be widened for the zero-crossing shifts caused by noise.

REFERENCES:
patent: 3537001 (1970-10-01), Friend
patent: 3760269 (1973-09-01), Beeman
patent: 3790720 (1974-02-01), Schartmann

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