Selective calling circuit

Details Selective calling circuit Selective calling circuit

1976-08-23

1978-09-12

Pitts, Harold I.

Communications: electrical

Digital comparator systems

340168R, 340168CC, 340164R, H04Q 900

Patent

active

041141385

ABSTRACT:
A selective calling circuit includes a central control code generator for generating a digital stream having repetitions of selected code words of digital information for selectively calling a plurality of remote receiving stations in this circuit. Each remote station includes a decoder for recognizing a predetermined sequence of digital information and reconstructing selected digital code words included therein.
A variable modulus counter, responsive to clock pulses and means for selectively varying the modulus of the counter, is included in the code generator at the central control station.
A resettable counter that counts in response to clock pulses and is reset in response to received code signals is included in the decoder at the remote station.

REFERENCES:
patent: 3387270 (1968-06-01), Adlhoch
patent: 3510777 (1970-05-01), Gordon
patent: 3585596 (1971-06-01), Rosenblatt
patent: 3634826 (1972-01-01), Biedermann
patent: 3654607 (1972-04-01), Wavre
patent: 3657477 (1972-04-01), Ehrat
patent: 3836887 (1974-09-01), Ueda
patent: 3852722 (1974-12-01), Neuville
patent: 4007422 (1977-02-01), DA Silva

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