Title :
High-frequency switching class-D power amplifier for portable sound applications
Author :
Choi, Byoung K. ; Hong, Y.U. ; Kwak, T.W. ; Lee, Meng Chuan ; Cho, Gook Hwa
Author_Institution :
KAIST
Abstract :
A 300 mW single-chip CMOS class-D audio power amplifier employing new control methods is proposed. A high frequency modulator that is suitable for portable applications is adopted in this power amplifier. Zero voltage switching (ZVS) and adaptive power control (APC) are used to minimize the power loss. The new class-D amplifier chip is implemented using a standard 0.35 mu CMOS process, and the test results are shown
Keywords :
CMOS integrated circuits; adaptive control; audio-frequency amplifiers; modulators; power amplifiers; power control; zero voltage switching; ZVS; adaptive power control; frequency modulators; portable sound applications; power loss minimization; single-chip CMOS switching class-D audio power amplifier; zero voltage switching; Adaptive control; Electromagnetic interference; Filters; Frequency; High power amplifiers; Power amplifiers; Programmable control; Switching circuits; Variable structure systems; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE
Conference_Location :
Jeju
Print_ISBN :
0-7803-9716-9
DOI :
10.1109/PESC.2006.1711756
