Telecommunications – Receiver or analog modulated signal frequency converter – Responsive to an input signal of particular predetermined...
Patent
1979-10-26
1982-06-08
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
Responsive to an input signal of particular predetermined...
455343, 455352, 34082572, 3403111, 34082548, H04B 106
Patent
active
043343198
ABSTRACT:
A battery-powered receiver having a switch for disconnecting the battery from radio frequency detection circuits within the receiver upon receipt of a sequence of coded address and command signals. Each address and command signal is a radio frequency modulated with an audio or tone frequency. A tone decoder within the receiver is sensitive to audio signals whose frequencies lie within any one of sixteen predetermined frequency ranges. Stored at the output of the decoder is an address code of two or more numbers representing tone frequencies, these numbers being representative of the particular receiver or group of receivers. A sequence of audio signals detected by the tone detector is compared with the stored address code. If the address signals are followed by a coded command signal, made up of a tone signal or sequence of tone signals, the tone detector gives an output which causes the battery switch to be opened for a time determined by the coding of the command signal.
REFERENCES:
patent: 2912574 (1959-11-01), Gensel
patent: 3238503 (1966-03-01), Ultermark et al.
patent: 3337805 (1967-08-01), Joseph
patent: 3355709 (1967-11-01), Hanus
patent: 3509361 (1970-04-01), Yello
patent: 3694755 (1972-09-01), Ward
patent: 3769593 (1973-10-01), Williams
patent: 3890592 (1975-06-01), Kitamura et al.
LandOfFree
Battery-powered receivers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Battery-powered receivers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Battery-powered receivers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-556220