Patent ID: 7782118
Filing Date: 2010-08-24
Classification: H01L,H03K

Abstract:
1. A gate drive circuit for a wide bandgap semiconductor junction gated transistor, comprising: a gate current limit resistor coupled to a gate input of the wide bandgap semiconductor junction gated transistor when in use, wherein the gate current limit resistor limits a gate current, provided to the gate input of the wide bandgap semiconductor junction gated transistor, as an ambient temperature increases; a AC-coupled charging capacitor coupled to the gate input of the wide bandgap semiconductor junction gated transistor when in use, wherein the AC-coupled gate charging capacitor is positioned parallel to the gate current limit resistor; and a diode coupled to the gate current limit resistor and the AC-coupled charging capacitor on one end and an output of a gate drive chip on the other end, wherein when in use the diode lowers a gate voltage output from the gate drive chip applied to the gate input of the wide bandgap semiconductor junction gated transistor through the gate current limit resistor.