A 113-dB DSD audio ADC using a density-modulated dithering scheme

Author

Wang, Chris Binan ; Ishizuka, Sonny ; Liu, Bill Yang

Author_Institution

Texas Instrum. Inc., Tucson, AZ, USA

Volume

38

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

114

Lastpage

119

Abstract

A stereo audio delta-sigma A/D converter is implemented to support both the standard pulse-code modulation audio and the direct stream digital (DSD) output format. It provides all the standard audio rates up to 192 kHz. A sixth-order, single-bit modulator is employed to achieve the noise performance as well as the bitstream output required by the DSD format. A novel density-modulated dithering scheme is utilized to dramatically reduce the tone level in the signal band without compromising the stability of the high-order modulator. This analog-to-digital converter achieves a dynamic range of 113 dB and a total harmonic distortion +N of 105 dB. It is fabricated in a 0.35-μm CMOS process with a die size of 10.5 mm².

Keywords

CMOS integrated circuits; Hi-Fi equipment; analogue-digital conversion; delta-sigma modulation; harmonic distortion; mixed analogue-digital integrated circuits; pulse code modulation; 0.35 micron; 192 kHz; CMOS process; DSD audio ADC; DSD output format; FIR filter; THD; analog-to-digital converter; bitstream output; density-modulated dithering scheme; direct stream digital output format; finite impulse response filter; high-order modulator; noise performance; pseudorandom sequence; pulse-code modulation audio; single-bit modulator; sixth-order modulator; standard PCM audio; stereo audio delta-sigma ADC; super audio CD; total harmonic distortion; Analog-digital conversion; CMOS process; Delta modulation; Digital modulation; Dynamic range; Pulse modulation; Pulse width modulation converters; Stability; Streaming media; Total harmonic distortion;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2002.806260

Filename

1158788