Frequency transposition method and device, in particular for the control of the transmission power of a cellular mobile telephone
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United States of America Patent
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Jun 15, 2010
Grant Date -
Sep 1, 2005
app pub date -
Feb 8, 2005
filing date -
Feb 10, 2004
priority date (Note) -
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Abstract
A frequency transposition device including an input terminal for receiving an incident signal SI and a modulator of the one-bit delta-sigma type MDU connected to the input terminal. A generator MGN provides a periodic auxiliary signal SAX with a frequency equal to a desired transposition frequency. A frequency transposer of the Gilbert cell type has a signal input BES connected to the output of the generator, a control input BCO connected to the output of the delta-sigma modulator MDU, and an output BS delivering a transposed signal STR.
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