학술논문
PowerDAC: a single-chip audio DAC with a 70%-efficient power stage in 0.5 /spl mu/m CMOS
Document Type
Conference
Author
Source
1999 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC. First Edition (Cat. No.99CH36278) Solid-state circuits Solid-State Circuits Conference, 1999. Digest of Technical Papers. ISSCC. 1999 IEEE International. :154-155 1999
Subject
Language
ISSN
0193-6530
Abstract
The path from digital (audio) input to analog output power normally consists of a D/A converter, a low-pass filter and a class AB amplifier (having low overall power efficiency). Generally this is a two-chip solution with a D/A converter and an amplifier implemented in different technologies. This paper presents a single-chip digital amplifier combining bitstream D/A conversion with a power-efficient switching output stage (class D) without intermediate filtering. The circuit is implemented in 0.5 /spl mu/m standard CMOS technology.