Radio selective call receiver

Details Radio selective call receiver Radio selective call receiver

1997-07-11

1999-05-25

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

341141, 341144, 341155, 455 381, 455 383, 455462, 455506, G08B 522

Patent

active

059072890

ABSTRACT:
A radio selective call receiver includes an instruction input device which produces an analog input signal and a radio receiver which receives a radio signal and demodulating it to produce an analog demodulated signal whose amplitude varies in a symbol period. A selector selects one of the analog input signal and the analog demodulated signal and is connected to an A-D converter. The A-D converter is shared between the analog demodulated signal and the analog input signal. An A-D conversion of the analog demodulated signal is performed at intervals synchronizing with the analog demodulated signal. An A-D conversion of the analog input signal is performed within a time period during which the analog-to-digital conversion of the analog demodulated signal is not performed.

REFERENCES:
patent: 5506700 (1996-04-01), Nishimura
patent: 5793303 (1998-08-01), Koga

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