In this paper, the error re-modulation method for digital correction of pulse width modulation switching amplifier is proposed. This method extracts an error signal from the difference between the reference pulse width modulation signal and power stage output, and generates the error pulse width modulation signal by using a re-modulation method. The error pulse width modulation signal is then used to compensate for the power supply noise and nonlinearity of the power stage. The proposed method is suitable for the correction of the PWM controller in a full digital amplifier.

Authors: Jang, Seong-cheol; Lee, Heesoo; Park, Haekwang; Shimanskiy, Vladislav; Song, Youngsuk
Affiliation: Audio Lab, Digital Media Research and Development Center, Samsung Electronics
AES Convention: 121 (October 2006) Paper Number: 6946
Publication Date: October 1, 2006
Subject: Amplifiers & High Resolution

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