Power consumption control for low noise amplifier
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United States of America Patent
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-
May 29, 2001
Grant Date -
N/A
app pub date -
Aug 20, 1999
filing date -
Aug 20, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control circuit is used to increase the dc current of a low noise amplifier for a mobile wireless communication system in the presence of jamming signal to preserve high dynamic range and low intermodulation distortion. The control circuit compares the peak jamming signal with the average input signal. The average signal is obtained by filtering the input signal with a low-pass filter. The difference signal between the input signal with jamming signal and the average input is detected by a peak detector. The detected signal is then again compared with the average input signal to obtain a dc control signal to control the power consumption of a LNA.
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