Communications: electrical – Continuously variable indicating – With meter reading
Patent
1982-11-19
1985-11-19
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
375116, 371 55, H04Q 700, H04B 116, G08B 2900, H04L 700
Patent
active
045545405
ABSTRACT:
A signal detection circuit for a digital radio paging receiver is provided for successfully detecting a desired signal. A demodulated carrier wave, modulated with a code having n bits, is written into an n-stage shift register in response to a clock pulse of frequency f.sub.s. The output stages of the shift register are scanned in response to a scan signal of frequency nf.sub.s in order to provide an output. The output is dependent on the coincidence of the shift register outputs with a predetermined code and is used to enable an address detector circuit which compares a received signal to the desired signal stored in a PROM.
REFERENCES:
patent: 3436730 (1969-04-01), Widel
patent: 3808367 (1974-04-01), Wigner et al.
patent: 4001693 (1977-01-01), Stackhouse et al.
patent: 4160240 (1979-07-01), Partidilo
patent: 4392135 (1983-07-01), Ohyagi
patent: 4412301 (1983-10-01), Strubeck
patent: 4479125 (1984-10-01), Mori
Post Office Code Standardization Advisory Group Codes, British Telecom of Britain, 1978; 1979 First Reprint, Jul. 1979, pp. 1-35.
Mori Toshihiro
Nagata Koichi
Nippon Electric Co. Ltd.
Yusko Donald J.
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