[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5573/JSTS.2010.10.4.276

A 2.5 V 109 dB DR ΔΣ ADC for Audio Application

Noh, Gwang-Yol (Dept. of Electronic Engineering, Sogang University)
Ahn, Gil-Cho (Dept. of Electronic Engineering, Sogang University)

Publication Information

JSTS:Journal of Semiconductor Technology and Science / v.10, no.4, 2010 , pp. 276-281 More about this Journal

Abstract

A 2.5 V feed-forward second-order deltasigma modulator for audio application is presented. A 9-level quantizer with a tree-structured dynamic element matching (DEM) was employed to improve the linearity by shaping the distortion resulted from the capacitor mismatch of the feedback digital-toanalog converter (DAC). A chopper stabilization technique (CHS) is used to reduce the flicker noise in the first integrator. The prototype delta-sigma analogto-digital converter (ADC) implemented in a 65 nm 1P8M CMOS process occupies 0.747 $mm^2$ and achieves 109.1 dB dynamic range (DR), 85.4 dB signal-to-noise ratio (SNR) in a 24 kHz audio signal bandwidth, while consuming 14.75 mW from a 2.5 V supply.

Keywords

Delta-sigma modulator; feed-forward; dynamic element matching, chopper stabilization;

Citations & Related Records

Times Cited By SCOPUS : 1

Reference

1	Y. Yang, A. Chokhawala, et al, “A 114-dB 68 mW chopper-stabilized stereo multibit audio ADC in $5.62 mm^2$ ,” Solid-State Circuits, IEEE Journal of, Vol.38, Issue 12, Dec. 2003, pp.2061-2068. DOI ScienceOn
2	O. Choksi, L. Carley, “Analysis of switchedcapacitor common-mode feedback circuit,” Circuits and Systems II: Analog and digital signal processing, IEEE Transactions on, Vol.50, Issue 12, Dec. 2003, pp.906-917. DOI
3	M. Kim, G. Ahn, et al, “A 0.9 V 92 dB doublesampled switched-RC delta-sigma audio ADC,” Solid-State Circuits, IEEE Journal of, Vol.43, Issue 5, May 2008, pp.1195-1206. DOI ScienceOn
4	C. Enz, G. Temes, “Circuit techniques for reducing the effects of op-amp imperfections: autozeroing, correlated double sampling, and chopper stabilization,” Proceedings of the IEEE, Vol.84, Issue 11, Nov. 1996, pp.1584-1614. DOI ScienceOn
5	J. Silva, U. Moon, et al, “Wideband low-distortion delta-sigma ADC topology,” IEE Electronic Letters, Vol.37, Issue 12, June 2001, pp. 737-738. DOI ScienceOn
6	I. Galton, “Spectral shaping of circuit error in digital-to-analog converters,” Circuits and Systems II: Analog and digital signal processing, IEEE Transactions on, Vol.44, Issue 10, Oct. 1997, pp.808-817. DOI ScienceOn