Patent ID: 6856520
Filing Date: 2005-02-15
Classification: H01L,H02J,H02M,H03K

Abstract:
1. A half-bridge circuit comprising a first DIGBT (double-side insulated gate bipolar transistor) having a first and second terminals and a primary gate and a secondary gate, the first terminal is coupled to a load, the second terminal is coupled to a supply voltage having a positive bias, the primary and secondary gates are each operatively coupled to means for supplying gate signals to said transistor, a second DIGBT having first and second terminals and a primary gate and a secondary gate, the second terminal of the second DIGBT is operatively coupled to the load and the first terminal of the first DIGBT through a common node, the first terminal of the second DIGBT is coupled to a supply voltage having a negative bias, the primary gate and the secondary gate of the second DIGBT are each operatively coupled to means for supplying gate signals, wherein the first and second DIGBTs are supplied with gate signals such that when the first DIGBT is performing a transistor switching function the second DIGBT is performing a freewheeling diode function and when the second DIGBT is performing a transistor switching function, the first DIGBT is performing a freewheeling diode function.