RMS power detection with signal-independent dynamics and related apparatus, system, and method
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United States of America Patent
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Apr 16, 2013
Grant Date -
N/A
app pub date -
Aug 24, 2009
filing date -
Aug 28, 2008
priority date (Note) -
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Abstract
A circuit is configured to receive an input signal and to produce an output signal measuring a power of the input signal. The circuit includes a multiplier cell configured to multiply first and second signals, where each of the first and second signals includes a component related to the input signal and a component related to the output signal. The circuit also includes a controlled amplifier configured to amplify an intermediate signal produced by the multiplier cell, where an amplification provided by the controlled amplifier is a function of the output signal. The circuit could further include at least one first converting amplifier configured to generate the component related to the input signal and at least one second converting amplifier configured to generate the component related to the output signal. Transconductances of the converting amplifiers could be selected to configure the circuit as a linear or logarithmic RMS power detector.
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