Patent ID: 7493355
Filing Date: 2009-02-17
Classification: G01D,H03K

Abstract:
1. A circuit configuration for determining an average value of an input signal, comprising: a signal input terminal for receiving the input signal and a signal output terminal for outputting an output signal (g, Q a comparator connected between said signal input terminal and said signal output terminal, said comparator having an output; a counter or summing unit connected between said signal input and said signal output for averaging, said counter having an input connected to said output of said comparator; a switching element connected in a feedback loop for selectively connecting a first reference signal or a second reference signal to an input of said comparator and activated by said output of said comparator for switching to the first reference signal or the second reference signal in dependence on an output signal at said output of said comparator; said counter or summing unit having a reset input connected to receive a control signal, wherein the control signal and the input signal have at least one of a common fundamental frequency, a common phase angle, and a constant phase relationship to one another.