Patent ID: 9194891
Filing Date: 2015-11-24
Classification: G01R,G06G

Abstract:
1. A Root Means Square (RMS) detector, comprising: a plurality of voltage/current sensing units configured to detect a current-shaped analog signal of an arbitrary electric load and to convert the detected current shaped analog signal into a voltage-shaped analog signal; a plurality of square circuit units each configured to compute a square function based on a voltage output from one of the plurality of voltage/current sensing units; a summing circuit unit configured to sum a plurality of voltages output from the plurality of square circuit units; and a root circuit unit configured to compute an RMS value based on a voltage output from the summing circuit unit, wherein each of the plurality of square circuit units comprises: a square function unit configured to compute the square function; a root function unit configured to compute a root function; and a differential circuit configured to subtract an output current of the root function unit from an output current of the square function unit.