Sanken Electric Co., Ltd.

Kazunao Tajima

Hideki Asuke

A gate driving circuit is provided which is capable of alleviating the effect of a switching noise generated when an IGBT is turned on/off or a common mode noise on a gate driving signal. The gate driving circuit, a primary side and a secondary side thereof being insulated from each other by a pulse transformer; the primary side of the pulse transformer being grounded to a first ground potential point; the secondary side of the pulse transformer being grounded to a second ground potential point insulated from the first ground potential point; and a gate driving signal generated in a secondary winding of the pulse transformer being outputted through a receiver having impedance matching resistors on the input side, includes an electrostatic shield plate between a primary winding of the pulse transformer and the secondary winding, the electrostatic shield plate being grounded to the second ground potential point.

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Niiza, Japan

Kazunao Tajima