Frequency-modulation demodulator threshold extension device

Details Frequency-modulation demodulator threshold extension device Frequency-modulation demodulator threshold extension device

1974-06-17

1976-09-28

Safourek, Benedict V.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325348, 325478, 329122, H04B 110

Patent

active

039834883

ABSTRACT:
A threshold extension device for use in a frequency modulation demodulator circuit to minimize effects of impulse noise, usually referred to as "clicks", which normaly appear in the demodulated output signal, and including a delay line for delaying the demodulated signal, a follow and hold circuit for selectively omitting the click impulses from the delayed signal, a detector for detecting the occurrence of an event which will give rise to a click impulse in the demodulated signal, and a detector driven control signal generator for controlling operation of the follow and hold circuit.

REFERENCES:
patent: 3205438 (1965-09-01), Buck
patent: 3346815 (1967-10-01), Haggai
patent: 3397360 (1968-08-01), Kaneko et al.
patent: 3588705 (1971-06-01), Paine et al.
patent: 3742361 (1973-06-01), Wason

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