Low distortion class-D amplifier

Details Low distortion class-D amplifier Low distortion class-D amplifier

2006-12-20

2008-12-30

Pascal, Robert (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S20700P

Reexamination Certificate

active

07471144

ABSTRACT:
A low distortion class-D amplifier. The amplifier comprises a power supply terminal for receiving power, an amplification stage, and an output stage. The amplification stage receives an input signal and generates a ramp signal. Further more, the amplification stage generates a pulse width modulation signal based on the ramp signal and a hysteretic signal. The output stage coupled to the power supply terminal receives the pulse width modulation signal and generates an output. Advantageously, the ramp signal and the hysteretic signal are positioned at a voltage level that is half the voltage level of said power supply and that varies proportionally with said power supply.

REFERENCES:
patent: 6614297 (2003-09-01), Score et al.
patent: 7221216 (2007-05-01), Nguyen

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