Noise-shaping D/A converters for ΔΣ modulation

Author

Galton, Ian

Author_Institution

California Univ., Irvine, CA, USA

Volume

1

fYear

1996

fDate

12-15 May 1996

Firstpage

441

Abstract

Delta-sigma (ΔΣ) data converters are highly sensitive to any signal-band conversion noise introduced by their internal DACs. To circumvent this problem, multibit DACs recently have been developed that use digital techniques to cause the conversion noise to reside primarily outside the signal-band. Such noise-shaping DACs have the potential to significantly increase the present precision limits of ΔΣ data converters. This paper extends the practicality of the approach by presenting extremely hardware-efficient 1st and 2nd-order noise-shaping multi-bit DACs. A simple theoretical explanation of the conversion noise-shaping phenomenon is also provided

Keywords

digital-analogue conversion; integrated circuit design; integrated circuit noise; sigma-delta modulation; conversion noise; conversion noise-shaping phenomenon; delta-sigma data converters; hardware-efficient designs; multibit DACs; noise-shaping D/A converters; precision limits; signal-band conversion noise; Circuit noise; Data conversion; Degradation; Delta modulation; Multi-stage noise shaping; Noise shaping; Quantization; Signal processing; Signal to noise ratio; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-3073-0

Type

conf

DOI

10.1109/ISCAS.1996.539979

Filename

539979