Gate driver for Class D audio amplifier with adaptive dV/dt...

Details Gate driver for Class D audio amplifier with adaptive dV/dt... Gate driver for Class D audio amplifier with adaptive dV/dt...

2008-07-01

2008-07-01

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S20700P

Reexamination Certificate

active

11396760

ABSTRACT:
Provided is a gate driver circuit for a Class D audio amplifier with adaptive dV/dt control. The circuit includes an output switching stage, a gate driver capable of driving the output switching stage with a variable dV/dt; and a mode control circuit for setting an operating mode of the gate driver, wherein, the operating mode is selected from a plurality of operating modes, changes the dV/dt of the gate driver, corresponds to a power output level, and provides a balance point between a generated Electromagnetic Interference (EMI) and an efficiency of the switching stage.

REFERENCES:
patent: 7061195 (2006-06-01), Ho et al.
patent: 2004/0130923 (2004-07-01), Ho et al.
International Search Report in corresponding International Application No. PCT/US06/12201 mailed Oct. 18, 2007.

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