Patent ID: 9488683
Filing Date: 2016-11-08
CPC Classification: F16H,G01B,G01D,G01R,G06F,H02H,H02J

Claim Text:
1. An AC measurement circuit to provide an average measurement of an AC signal, the circuit comprising: a rectifier for receiving said AC signal and providing a rectified output, the AC signal having an expected voltage range; a peak detection circuit for detecting peak values of an input voltage; an analog to digital converter, having its analog input interconnected with an output of said peak detection circuit, for providing a digital output corresponding to detected peak values of said input voltage and to provide n samples of said digital output, n having been selected based on a ratio of the maximum peak value of said expected voltage range and the dynamic range of said analog input; a voltage divider, interconnected with an output of said rectifier, and the input of said peak detection circuit to provide said peak detection circuit with said input voltage equal to a fraction of said rectified output, said fraction being a reciprocal of a multiple of n; and a processing circuit to calculate said average measurement of said AC signal by summing said n samples of said digital output.