Receiver for a HF-intrusion detection system

Details Receiver for a HF-intrusion detection system Receiver for a HF-intrusion detection system

1977-05-24

1979-04-10

Yusko, Donald J.

Communications: electrical

Condition responsive indicating system

Specific condition

325425, 340552, 343 5PD, G08B 1324

Patent

active

041491572

ABSTRACT:
A receiver in which the detection sensitivity of a detection diode is adjustable as a function of the polarization current, and is controlled by means of a feedback circuit provided with a delay element so that changes in the received signals having a frequency below a value determined by the delay element are eliminated.

REFERENCES:
patent: 3378834 (1968-04-01), Corbell
patent: 3691556 (1972-09-01), Bloice
patent: 3731307 (1973-05-01), Charlot, Jr.
patent: 3879719 (1975-04-01), Buckley et al.

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