PowerDAC: a single-chip audio DAC with a 70%-efficient power stage in 0.5 /spl mu/m CMOS

Author

Philips, K. ; van den Homberg, J. ; Dijkmans, C.

Author_Institution

Philips Res. Lab., Eindhoven, Netherlands

fYear

1999

fDate

17-17 Feb. 1999

Firstpage

154

Lastpage

155

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.

Keywords

CMOS integrated circuits; Hi-Fi equipment; audio-frequency amplifiers; circuit feedback; digital-analogue conversion; mixed analogue-digital integrated circuits; power amplifiers; switching circuits; 0.5 micron; 1 MHz; 2 W; 5 V; 70 percent; D/A converter; PowerDAC; bitstream D/A conversion; class AB amplifier; class D output stage; digital stereo power amplifier; low-pass filter; power stage; power-efficient switching output stage; single-chip audio DAC; single-chip digital amplifier; standard CMOS technology; CMOS digital integrated circuits; Clocks; Digital filters; Driver circuits; Power amplifiers; Power measurement; Semiconductor device measurement; Shape measurement; Solid state circuits; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1999. Digest of Technical Papers. ISSCC. 1999 IEEE International

Conference_Location

San Francisco, CA

ISSN

0193-6530

Print_ISBN

0-7803-5126-6

Type

conf

DOI

10.1109/ISSCC.1999.759171

Filename

759171