Squelch-tail eliminator

Details Squelch-tail eliminator Squelch-tail eliminator

1988-07-25

1991-05-07

Kuntz, Curtis

Telecommunications

Transmitter and receiver at separate stations

455212, 455218, H04B 110

Patent

active

050143433

ABSTRACT:
A system and method to eliminate the squelch-tail in radio receivers used for data communications. The transmitter adds a brief period of unmodulated carrier signal to the end of each data transmission. A sensor in the receiver detects this period and mutes the output of the receiver before the receiver's normal noise sensing circuitry senses that the transmission has ended. A circuit may be added to the transmitter to correct the last data bit sent in the data transmission.

REFERENCES:
patent: Re32278 (1986-11-01), Yokota et al.
patent: 2767310 (1956-10-01), Walker
patent: 3810023 (1974-05-01), Crowley et al.
patent: 3962646 (1976-06-01), Tempka
patent: 4020421 (1977-04-01), Elder et al.
patent: 4153878 (1979-05-01), Osborn
patent: 4431991 (1984-02-01), Bailey et al.
patent: 4525867 (1985-06-01), Shiratani
patent: 4703507 (1987-10-01), Holden
patent: 4748688 (1988-05-01), Coash

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