Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 28, 2010
Patent Application Number
12330110
Date Filed
December 8, 2008
Patent Primary Examiner
Patent abstract
A driver circuit facilitates reducing noises and losses and improving the driving performances thereof without connecting a series circuit of capacitor and a resistor to the gate of IGBT. The driver circuit includes a slope setting circuit that sets the gate voltage waveform of IGBT; and an operational amplifier that includes a non-inverting input terminal, to which an output voltage V* from slope setting circuit is inputted, and an inverting input terminal, to which a divided voltage Vgsf divided by resistors is inputted; and the operational amplifier outputs an output voltage Vout, proportional to the difference between the output voltage V* and the divided voltage Vgsf, to the gate of IGBT.
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