Patent Number: 7,786,796

Title: Audio amplifier

Abstract: An audio amplifier including a differential mode integrator, a first comparator, a second comparator, a logic circuit and a driving unit is provided. The differential mode integrator receives a differential input signal and a differential output signal and outputs a differential mode intermediate signal. The first comparator has a positive input terminal receiving a first terminal signal of the differential mode intermediate signal, a negative input terminal receiving a ramp signal, and generates a first signal. The second comparator has a positive input terminal receiving a ramp signal, a negative input terminal receiving a second terminal signal of the differential mode intermediate signal, and generates a second signal. The logic circuit performs a logic operation on the first and second signals to generate a third signal and a fourth signal. The driving unit generates a differential output signal to drive a load according to the third and fourth signals.

Inventors: Liu; Yu-Ren (Hsinchu County, TW)

Assignee: ITE Tech. Inc.

International Classification: H03F 3/38 (20060101); H03F 3/217 (20060101)

Expiration Date: 8/31/12018