| 摘要 |
The invention provides a method and a circuit arrangement for measurement of the current through an inductive load L wherein the current is fed into the inductive load L with the aid of a full-bridge circuit. By way of example, full-bridge circuits such as these are used to feed a current in a pulse-width-modulated form into a winding of a direct-current, stepping or plunger coil motor. A respective measurement device (Ra, Rb) is provided for each half-bridge. In this case, a respective measurement device (Ra, Rb) is arranged between in each case one series circuit of switching elements and ground (VSS) or the supply voltage (VDD), respectively, at which a respective voltage is tapped off, which is a measure of the current through the respective measurement device. The device for measurement of the current has at least one switching device (S), by means of which one of the two inputs (e1, e2) of differential amplifier (D) can be selectively connected to ground (VSS) or to the supply voltage (VDD), or to one of the two measurement devices.
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