Patent ID: 8593211
Filing Date: 2013-11-26
Classification: H03K

Abstract:
1. An apparatus, comprising: a first gallium nitride field effect transistor (GaN FET); a first driver coupled to a gate of the first GaN FET; an anode of a capacitor coupled to an output of a driver and a source of the first GaN FET; a diode having a cathode coupled to the cathode of the capacitor; and a bootstrap capacitor clamp (BCC) controller, including: a comparator coupled to a gate of the FET, the comparator configured to receive as inputs: wherein the BCC controller is configured to compare: wherein the BCC controller is further configured to maintain a relationship between the first comparison signal and the second comparison signal base on the comparison, and wherein the BCC controller is further configured to drive a gate output signal to the first GaN FET to maintain this relationship.