Patent ID: 7626378
Filing Date: 2009-12-01
Classification: G01R

Abstract:
1. A self-powered alternating current measuring and power generating circuit including in combination: first and second input terminals; a single current to voltage transformer having primary and secondary windings; a resistor connected at a junction in series with the primary winding of the transformer across the first and second input terminals; an RMS to direct current (DC) convertor having an output, and having an input coupled to the junction of the resistor and the primary winding of the transformer, said RMS to direct (DC) conveter having inputs of approximately 3.3 VDC and −3 VDC; a rectifier having an input coupled across the secondary winding of the transformer, and having an output coupled to the convertor to supply operating power to the convertor; and means for coupling a load to the output terminal of the convertor.