Gate driving circuit with switched-capacitor circuit to generate negative gate-source voltage pulses
AssigneeCity University of Hong Kong
InventorsHo Tin Tang, Shu Hung Henry Chung
Life of this patent
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Abstract
An apparatus for driving a MOSFET, which includes a first gate driver adapted to generate a driving signal for a MOSFET, a switched capacitor circuit connected to the first gate driver and adapted to generate temporarily a negative voltage to counteract a spurious voltage occurred at the first gate driver; and a second gate driver comprising adapted to drive the switched capacitor circuit. The first gate driver and the second gate driver are powered by a same voltage source and controlled by a same control logic. The apparatus is adapted to momentarily generate a negative voltage that could counteract the spurious voltage generated by switching devices, and improve the switching performance.
Claims12
An apparatus for driving a MOSFET, comprising:
- a) a first gate driver adapted to generate a driving signal for a MOSFET;
- b) a switched capacitor circuit connected to the first gate driver and adapted to generate temporarily a negative voltage to counteract a spurious voltage occurred at the first gate driver;
- and
- c) a second gate driver adapted to drive the switched capacitor circuit;
- wherein the first gate driver and the second gate driver are powered by a same voltage source and controlled by a same control logic.
Dependencies are inferred from the claim text.