Patent ID: 7848126
Filing Date: 2010-12-07
Classification: H02M

Abstract:
1. A current regulator for regulating a current through a load, the current regulator comprising: a current measuring circuit configured to determine an amount of current that flows through the load and to generate a current measurement signal that depends on the amount of current; and a switching circuit configured to cycle between a first state and a second state, and configured to receive a reference current signal and cause a supply voltage to be applied across the load, the supply voltage having a first voltage level during the first state and a second voltage level during the second state, wherein the switching circuit is further configured to integrate the difference between the current measurement signal and the reference current signal during each drive cycle to obtain a difference integration signal, and to begin a new drive cycle responsive to the difference integration signal reaching a predefined threshold value after an end of a duration of the first state, the duration of the first state is constant for all drive cycles.