Multistage amplifier for rapid acquisition and random received signal power applications
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United States of America Patent
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Mar 3, 2009
Grant Date -
Mar 30, 2006
app pub date -
Sep 27, 2004
filing date -
Sep 27, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for signal amplification and decision device operation on a signal which has a magnitude, peak value, or other average power that varies over time. In general, a peak detector detects the peak value of a received signal and responsive to the peak value, selectively enables a decision device when the signal is amplified to increase decision device accuracy. The decision may occur before the amplification forces the signal into saturation. Multi-stage amplification in combination with controlled switching or multiplexing may be utilized to selectively amplify the signal and selectively initiate decision device operation. The peak detector value may also control signal amplification levels in a multi-stage amplifier. Responsive to the peak value, a switch, which receives as its input the output from one or more amplifier stages, may be controlled to output the signal after a desired amount of amplification.
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