Patent ID: 7075355
Filing Date: 2006-07-11
Classification: H03K

Abstract:
1. A drive circuit for driving an insulated gate transistor, said drive circuit comprising: a driver for applying a gate voltage to said transistor; and a timing controller for controlling a timing of said driver, wherein said driver is capable of applying said gate voltage as a first gate voltage and as a second gate voltage to said transistor, said first gate voltage being lower than a threshold voltage of said transistor, and said second gate voltage being a specified voltage for driving said transistor, wherein said timing controller controls said driver so that an application of said first gate voltage precedes an application of said second gate voltage, wherein said driver is capable of further applying said gate voltage as a third gate voltage to said transistor, said third gate voltage being higher than said first gate voltage and lower than said second gate voltage, and wherein said timing controller controls said driver so that application of said third gate voltage follows application of said first gate voltage, and application of said second gate voltage follows a recovery current of a main current of said transistor within a mirror effect time of said transistor.