Electronic interrogation circuits

Details Electronic interrogation circuits Electronic interrogation circuits

1989-03-29

1991-05-07

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

Using a particular modulation

34087016, 34082554, 34082506, G05B 1126

Patent

active

050140507

ABSTRACT:
The invention relates to an electronic circuit for remote interrogation of a receiver through a two wire line and to detect the response signals emitted by this receiver. The circuit comprises means for comparing with a reference voltage the actual voltage defining said response signals. This reference voltage is a weighted variable voltage obtained by low band-pass filtering, in a resistance-capacity circuit, of said actual voltage.

REFERENCES:
patent: 3783387 (1974-01-01), Wernli
patent: 4520488 (1985-05-01), Houvig et al.
patent: 4806905 (1989-02-01), McGowan, III et al.

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