CIRCUITS FOR USE IN RADIO COMMUNICATIONS
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United States of America Patent
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Issued Date -
Jan 18, 2007
app pub date -
Sep 21, 2006
filing date -
Apr 21, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A frequency synthesiser circuit for use in wireless communications including a phase locked loop including a VCO (voltage controlled oscillator), wherein the synthesiser circuit includes a further oscillator which in operation is a free running oscillator at a frequency higher than the VCO and a mixer connected to receive input signals from the VCO and from the further oscillator and to combine such signals. Also described is a wireless communications transmitter or receiver incorporating the frequency synthesiser circuit.
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