Patent Number: 6,683,494

Title: Digital signal processor enhanced pulse width modulation amplifier

Abstract: A pulse width modulator (PWM) audio power amplifier with a switch mode power converter is provided that may adjust the duty of the switch mode power converter based on output current. The PWM audio power amplifier may include a digital signal processor to process an input signal and control the switch mode power converter to minimize distortion in an amplified output signal. The control within the PWM audio power amplifier may include digital feed forward open loop control or may combine digital feed forward open loop control with analog negative feedback closed loop control to minimize distortion in the output signal.

Inventors: Stanley; Gerald R. (Osceola, IN)

Assignee: Harman International Industries, Incorporated

International Classification: H03F 3/217 (20060101); H03F 3/20 (20060101); H03F 003/38 ()

Expiration Date: 01/27/2021