Circuit for saving battery for use in a radio paging receiver an

Details Circuit for saving battery for use in a radio paging receiver an Circuit for saving battery for use in a radio paging receiver an

1990-01-04

1993-03-09

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455343, 34082544, H04Q 302, H04B 702, H04B 116

Patent

active

051932121

ABSTRACT:
A circuit for saving battery power in a radio paging receiver having a process for supplying first and second power saving signals indicative of first and second ON and OFF power signals. A first radio-frequency section converts the received radio-frequency signals upon reception of the first ON power signal; a second radio-frequency section then filters and demodulates the output signals from the first radio-frequency section to provide demodulated signals having a first voltage upon reception of the second ON power. A waveform shaper shapes the waveform of the demodulated signals to provide digital signals to the processor upon reception of the second ON power signal; and a switch enables and disables transmission of the first and second ON and OFF power signals from a power source to the first and second radio-frequency sections and the waveform shaper upon reception of the first and second power saving signals.

REFERENCES:
patent: 4479125 (1984-10-01), Mori
patent: 4479261 (1984-10-01), Oda et al.
patent: 4491978 (1985-01-01), Nagata et al.
patent: 4506386 (1985-03-01), Ichikawa et al.
patent: 4768031 (1988-08-01), Mori et al.
patent: 4823398 (1989-04-01), Hashimoto
patent: 4955080 (1990-09-01), Wagai et al.
patent: 5027428 (1991-06-01), Ishiguro et al.
Carlson, Communication Systems: An Introduction to Signals and Noise in Electrical Communications 1986, McGraw-Hill Book Company, pp. 273-277.
Clarke et al., Communication Circuits: Analysis and Design, Sep. 1978, Addison Wesley Publishing Company, pp. 293-295.

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