Patent ID: 8373487
Filing Date: 2013-02-12
Classification: G01R

Abstract:
1. An apparatus comprising: a signal squarer module adapted to generate a power of an input signal; a reference squarer module adapted to generate a power of a reference signal; a signal switch adapted to provide the power of the input signal to an integration module during a programmable runup interval; a reference switch adapted to provide the power of the reference signal to the integration module during a rundown interval following the runup interval; the integrating module adapted to integrate the power of the input signal over the runup interval to build up an integrated voltage and to receive a negative of the power of the reference signal to de-integrate the integrated voltage over the rundown interval; a comparator adapted to generate a detect signal when the integrated voltage completely de-integrates over the rundown interval; and a controller adapted to determine and to control the runup interval, to receive the detect signal to measure the rundown interval, and to generate a digital signal proportional to an average power of the input signal over the runup interval.