Patent ID: 8471569
Filing Date: 2013-06-25
Classification: G01R,H02P

Abstract:
1. A method for measurement of the current through an inductive load (L), into which the current is fed with the aid of a full-bridge circuit (Ta 1 , Ta 2 , Tb 1 and Tb 2 ) which has two series circuits of switching elements (Ta 1 , Ta 2 and Tb 1 , Tb 2 , respectively) connected in parallel, the method comprising: a) a voltage is tapped off from each of two measurement devices (Ra, Rb), which voltage is a measure of the current through the respective measurement device (Ra, Rb), wherein in each case one measurement device is arranged between in each case one series circuit of switching elements and ground (VSS) or the supply voltage (VDD); b) these voltages are supplied to a differential amplifier (D), whose inputs (e c) with the aid of a switching device (S), one of the two inputs (e d) wherein when the current through the inductive load L flows through both measurement devices (Ra, Rb) at the same time, one of the two inputs (e