Title:
DUAL MODE POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO2003005528
Kind Code:
A8
Abstract:
A battery (102) powers a wireless telephone's power amplifier (106) through a Switch Mode Power Supply (SMPS) (104). The SMPS has a capacity lower than the maximum power requirements of the amplifier. When a controller (116) senses that an amplifier power-requirements threshold has been exceeded, it closes a switch (114) parallel to the SMPS, allowing power to flow from the battery to the amplifier without passing through the SMPS. This architecture allows the use of a smaller SMPS, and eliminates SMPS-generated noise to the amplifier when the amplifier is least able to tolerate such noise, namely, under high power conditions.
Inventors:
BALLANTYNE GARY J
BARGROFF KEITH
CHAN PAUL L
KLAREN JONATHAN
PERSICO CHARLES J
SCOTT WALTER CHARLES
SITHIDETH SOMPHOU
BARGROFF KEITH
CHAN PAUL L
KLAREN JONATHAN
PERSICO CHARLES J
SCOTT WALTER CHARLES
SITHIDETH SOMPHOU
Application Number:
PCT/US2002/021041
Publication Date:
March 06, 2003
Filing Date:
July 03, 2002
Export Citation:
Assignee:
QUALCOMM INC (US)
International Classes:
H02J7/00; (IPC1-7): H02J7/00
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