Digital detector

Details Digital detector Digital detector

1976-08-06

1977-09-06

Heyman, John S.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

328138, 329126, H03K 906

Patent

active

040471144

ABSTRACT:
A digital detector which responds to sinusoidal or square wave input sign to detect the presence of a particular frequency or band of frequencies and provide a selectable digital output indicating the presence of this frequency or band. A gated pulse generator operates in response to the input signals, providing pulses that are counted by a binary counter and sensed by a decoder which detects the presence or absence of the frequencies within the selectable bandwidth limits.

REFERENCES:
patent: 3543172 (1970-11-01), Seppeler
patent: 3548328 (1970-12-01), Breikss
patent: 3594588 (1971-07-01), Evans et al.
patent: 3769583 (1973-10-01), Spencer et al.
patent: 3944935 (1976-03-01), Plant
patent: 3999136 (1976-12-01), O'Berry et al.

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