Noise blanking circuit and method

Details Noise blanking circuit and method Noise blanking circuit and method

1983-11-14

1985-06-04

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Squelch

328165, 455225, H04B 110

Patent

active

045219176

ABSTRACT:
Noise blanking is provided by amplifying, limiting and detecting received signals. The detected signals are compared with a threshold circuit. The leading edge of each detected signal that rises at a rate greater than a selected rate to exceed an amplitude threshold level produces a blanking pulse of selected time duration. Low as well as high level noise signals are blanked. Slow rising information signals are not blanked, and fast rising information signals of high level are blanked initially for the selected time duration, but are not blanked thereafter.

REFERENCES:
patent: 3978412 (1976-08-01), Frerking
patent: 4114105 (1978-09-01), Duncan
patent: 4327446 (1982-04-01), Dressler

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