Mixed-Order Sturdy MASH Δ-Σ Modulator

Author

Maghari, N. ; Kwon, S. ; Temes, G.C. ; Moon, U.

Author_Institution

Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR

fYear

2007

fDate

27-30 May 2007

Firstpage

257

Lastpage

260

Abstract

An enhanced version of Sturdy MASH (SMASH) (Maghari et al., 2006) delta-sigma modulator is proposed. This structure takes advantage of the well-known stability of the MASH structure while greatly reducing its sensitivity to imperfect circuit blocks. Furthermore, no digital noise cancellation filters are needed. Hence there is no matching requirement for the analog and digital paths. With the proposed enhancement in noise shaping, the first and second stage quantization noise experience different (thus mixed) orders of noise shaping, and the accuracy of this modulator is comparable of that of the MASH structure. Simulations results and mathematical analysis demonstrate the effectiveness of this structure.

Keywords

delta-sigma modulation; mathematical analysis; mixed-order sturdy MASH Delta-Sigma modulator; noise shaping; quantization noise; Analytical models; Circuit noise; Circuit stability; Delta modulation; Digital filters; Mathematical analysis; Multi-stage noise shaping; Noise cancellation; Noise shaping; Quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on

Conference_Location

New Orleans, LA

Print_ISBN

1-4244-0920-9

Electronic_ISBN

1-4244-0921-7

Type

conf

DOI

10.1109/ISCAS.2007.378384

Filename

4252620