Patent ID: 7145315
Filing Date: 2006-12-05
Classification: H02M,Y02B

Abstract:
1. A switch regulator comprising: a voltage node having a fixed voltage level; an electrical device having a current level limitation; a clock for providing a control signal; a first switching transistor having a first gate, a first main electrode, and a second main electrode, the first gate being coupled to receive the control signal from the clock, the first main electrode being coupled to the voltage node; a second switching transistor having a second gate coupled to receive the control signal from the clock; a reference transistor having a third gate coupled to receive the control signal from the clock; wherein the control signal provided from the clock turns on the first switching transistor and the reference transistor and turns off the second switching transistor; wherein the first switching transistor is electrically coupled in series to the electrical device via the second main electrode when the first switching transistor is turned on; and wherein the reference transistor determines a current going through the electrical device when the first switching transistor and the reference transistor are turned on.