Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1998-07-23
2000-02-22
Paladini, Albert W.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307 66, 363 59, 455343, H04B 116
Patent
active
060283742
ABSTRACT:
An electronic apparatus such as a digital wide area pager has a receiver IC (10) capable of operating directly from a single cell battery (24) for as long as the terminal voltage (V.sub.BAT) is above a specified minimum voltage. Other ICs (14, 16) of the pager operate at a higher voltage supplied by a multiplier (26) connected to the battery (24). The multiplier (26) is able to operate at values of V.sub.BAT below the specified minimum voltage. A control circuit (34) determines when the terminal voltage (V.sub.BAT) decays below the specified minimum voltage and supplies the receiver IC (10) with a stepped-down voltage from the multiplier (26) to ensure its sensitivity remains acceptable.
REFERENCES:
patent: 4560887 (1985-12-01), Schneider
patent: 5193212 (1993-03-01), Son
patent: 5399956 (1995-03-01), De Luca et al.
patent: 5410734 (1995-04-01), Choi et al.
patent: 5448756 (1995-09-01), DeLuca et al.
Paladini Albert W.
Slobod Jack D.
U.S. Philips Corporation
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