Patent ID: 6555997
Filing Date: 2003-04-29
Classification: G01R

Abstract:
A single-phase input module (3a, 3b, 3c) for an electricity meter (1) comprising:an analog current input and an analog voltage input (4a, 4aa and 4b respectively), wherein said inputs are connected to a signal converter means (5, 5a, 5b, 55, 41a, 41b), which includes a &Sgr;&Dgr;-modulator (5, 5a, 5b, 55), and hardware multiplying means (21, 71) for forming a power value (W), characterised in that provided as the signal converter means (5, 5a, 5b, 55, 41a, 41b) is at least one analog/digital converter which includes the &Sgr;&Dgr;-modulator (5, 5a, 5b, 55) and at least one decimation filter (41a, 41b), the input module (3a, 3b, 3c) is in the form of an integrated circuit, and the hardware multiplying means (21, 71) is integrated into the integrated circuit and is connected on the output side of the analog/digital converter (5, 5a, 5b, 55, 41a, 41b).