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A Single Chip 1 W CMOS Audio Power Amplifier with Pseudo Buffer Analog and Class D Switching Mixed Mode for Mobile Application
Ji-Yeoul RYOO Gyu-Hyeong CHO
IEICE TRANSACTIONS on Electronics
Publication Date: 2005/09/01
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic Circuits
analog, switching, audio power amplifier, reverse recovery current, on-chip,
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A single chip analog and class D switching mixed mode audio power amplifier using 0.35 µm CMOS process is presented in this paper. It has on-chip power MOSFET's and adopts a novel reverse recovery current free gate control that can reduce EMI noise and current stress of the power MOSFET's. It shows about 0.1% THD at 1 kHz and up to 87% efficiency at 4 Ω BTL at 3.3 V single power supply.