Class D amplifier

Details Class D amplifier Class D amplifier

2005-08-30

2005-08-30

Mottola, Steven J. (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S251000

Reexamination Certificate

active

06937091

ABSTRACT:
A complementary signal generating circuit (301) generates first complementary signals (S1,S2) from a PWM signal. A signal converting circuit (302) converts the first complementary signals to second complementary signals (S3, S4or S5, S6) having a voltage component based on a negative power supply (VPP−). Among the second-complementary signals, the signals (S3, S4) are supplied to a driving circuit (305), and the signals (S5, S6) are supplied to a current driving circuit (303). In response to the signals (S5, S6), the current driving circuit outputs third complementary signals (H3, H4) having a current component that is directed toward the negative power supply (VPP−), to a driving circuit (304). As a result, the driving circuits (304, 305) complementarily drive power-MOS transistors (401, 402).

REFERENCES:
patent: 5838193 (1998-11-01), Myers et al.

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