Multi-frequency signal receiving circuit

Details Multi-frequency signal receiving circuit Multi-frequency signal receiving circuit

1973-04-27

1976-01-20

Claffy, Kathleen H.

H04M 100

Patent

active

039340961

ABSTRACT:
A multi-frequency signal receiving circuit comprising a check circuit for discriminating the existence of a predetermined number of signal frequencies constituting a signal to produce an output, a timing circuit for delaying the output of the check circuit, a rectifying circuit for receiving the signal to detect the received signal energy and produce an output, a timing circuit for delaying the output of the rectifying circuit, an AND gate circuit for receiving the outputs of the two timing circuits to produce an output, and control means for controlling the transmission of the signal to the output circuit of the receiving circuit in accordance with the output of the AND gate circuit, whereby the normal operation of the receiving circuit can be ensured even when the signal frequencies arrive with a large arriving time difference and the operation start time is quickened.

REFERENCES:
patent: 3128349 (1964-04-01), Boesch
patent: 3140357 (1964-07-01), Bischof et al.
patent: 3288940 (1966-11-01), Bennett et al.
patent: 3582562 (1971-06-01), Sellari
patent: 3686440 (1972-08-01), Kroeger
patent: 3875347 (1975-04-01), Alaily

Affiliated with

Also associated with

Rating

Multi-frequency signal receiving circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-frequency signal receiving circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-frequency signal receiving circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1699473