Zero-voltage complementary switching high efficiency class D amp

Details Zero-voltage complementary switching high efficiency class D amp Zero-voltage complementary switching high efficiency class D amp

1992-05-20

1994-04-26

Mullins, James B.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

330251, H05B 4116, H03F 3217

Patent

active

053069862

ABSTRACT:
A high-efficiency Class D amplifier is described. In one embodiment, the amplifier contains two transistors which are turned on and off in sequence, the output being taken from the common node between the transistors. The efficiency of the amplifier is substantially increased by insuring that voltage across each of the transistors is substantially zero when it turns on. This advantage is achieved by connecting an inductance to the common node, so that the electrical energy stored in any stray capacitance is transferred to the inductance before any transistor is turned on.

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