Process for reducing the electrical consumption of a transmitter/receiver of digital information, in particular a cellular mobile telephone, and corresponding transmitter/receiver
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United States of America Patent
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Apr 5, 2005
Grant Date -
Jan 24, 2002
app pub date -
Jun 21, 2001
filing date -
Jun 28, 2000
priority date (Note) -
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Abstract
The electrical consumption of a cellular mobile telephone is reduced by using fractional-division phase-locked loops receiving a frequency reference from a fairly inaccurate quartz oscillator. Electrical consumption is also reduced by switching the output of the oscillator onto the input of the processing stage when the transmission/reception stage is inactive. The fractional-division phase-locked loops can then be deactivated.
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