Digital squelch circuit

Details Digital squelch circuit Digital squelch circuit

1995-09-01

1997-10-07

Bocure, Tesfaldet

Pulse or digital communications

Receivers

Interference or noise reduction

455212, H04B 110

Patent

active

056756143

ABSTRACT:
A digital squelch system (100) includes a timing signal generator (102) for generating a reference window. An edge detector (106) detects edges in the input signal during this reference window. An accumulator (110) accumulates the number of coherencies. An overflow detector (112) coupled to the accumulator (110) detects overflow conditions therein. A latch coupled to the overflow detector (112) squelches and unsquelches the radio (200) when the overflow or underflow conditions have been detected, respectively.

REFERENCES:
patent: 3851253 (1974-11-01), Eastmond
patent: 3852671 (1974-12-01), Risley
patent: 3939431 (1976-02-01), Cohlman
patent: 3940698 (1976-02-01), Itoh
patent: 4344175 (1982-08-01), Leslie
patent: 4783845 (1988-11-01), McChesney et al.
patent: 5408693 (1995-04-01), Alton et al.
patent: 5446921 (1995-08-01), Tobler

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