DYNAMIC BANDWIDTH CONTROL SCHEME OF A FRAC-N PLL IN A RECEIVER
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United States of America Patent
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Issued Date -
Apr 17, 2014
app pub date -
Jul 16, 2013
filing date -
Nov 11, 2009
priority date (Note) -
Abandoned
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Abstract
A receiver includes a mixer, a filter, a received signal strength indicator, and a control loop. The mixer is adapted to convert the frequency of a received signal. The filter is adapted to filter out undesired signals that may be present in the output signal of the mixer. The received signal strength indicator is adapted to detect blocker (also known as jammer) signals that may be present in the output signal of the low-pass filter and generate a feedback signal in response. The control loop is adapted to vary its bandwidth in response to the feedback signal of the received signal strength indicator. The control loop supplies an oscillating signal to the mixer.
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