Title :
A Digital Input Controller for Audio Class-D Amplifiers with 100W 0.004% THD+N and 113dB DR
Author :
Ido, T. ; Ishizuka, Shuhei ; Risbo, L. ; Aoyagi, F. ; Hamasaki, Taisuke
Author_Institution :
Texas Instruments, Kanagawa
Abstract :
A digital input controller for audio class-D amplifiers is presented. The controller utilizes specially configured integrated DAC and power stage feedback loop to suppress distortion components coming from power-stage switching with digital input capability. The class-D amplifier system with the controller and an existing power stage achieves 113dB DR, 0.0018% THD+N with 10W output power, and 0.004% THD+N with 100W output power into 4Omega load
Keywords :
audio-frequency amplifiers; digital control; feedback; harmonic distortion; 100 W; 4 ohm; audio class-D amplifiers; digital input controller; distortion suppression; dynamic range; harmonic distortion; power stage feedback loop; power-stage switching; Digital control; Digital filters; Feedback loop; Frequency; Low pass filters; Power amplifiers; Power generation; Pulse amplifiers; Pulse width modulation; Topology;
Conference_Titel :
Solid-State Circuits Conference, 2006. ISSCC 2006. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-4244-0079-1
DOI :
10.1109/ISSCC.2006.1696185
