Class D MOSFET amplifier and voltage supply balance circuit ther

Details Class D MOSFET amplifier and voltage supply balance circuit ther Class D MOSFET amplifier and voltage supply balance circuit ther

1991-04-08

1992-05-26

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including class d amplifier

330 10, 330297, H03F 3217

Patent

active

051171988

ABSTRACT:
The invention is directed to an improved electronic circuit using MOSFET (FET) devices for use in a first embodiment as a class D amplifier and in a second embodiment as a voltage balance circuit for a class D amplifier. In the first embodiment the operating functions of a conventional class D MOSFET amplifier is improved by the addition of a pair of Schottky diodes one of which is connected between the source terminals of the FETs and another connected between the drain terminals of the FETs and the addition of a pair of inductors one connected between the source of one FET and a third inductor and the other connected from the drain of the other FET to the third inductor. The other side of the third inductor provides the output of the class D amplifier. In the second embodiment, the circuit of the first embodiment is converted to a voltage balance circuit by grounding the output end of the first two inductors.

REFERENCES:
patent: 5023566 (1991-06-01), El-Hamamsy et al.

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