A General Formulation of Analog-to-Digital Converters Using Parallel Sigma-Delta Modulators and Modulation Sequences

Author

Blad, Anton ; Johansson, Håkan ; Löwenborg, Per

Author_Institution

Electron. Syst., Linkoping Univ.

fYear

2006

fDate

4-7 Dec. 2006

Firstpage

438

Lastpage

441

Abstract

A formulation based on multirate theory is introduced for analog-to-digital converters using parallel sigma-delta modulators in conjunction with modulation sequences. It is shown how the formulation can be used to analyze a system´s sensitivity to channel mismatch errors by means of circulant and pseudo-circulant matrices. It is demonstrated how the time-interleaved-modulated (TIM), Hadamard-modulated (HM) and frequency-band decomposition (FBD) converters can be viewed as special cases of this more general description, and it is shown why the TIM and HM ADCs are sensitive to channel mismatch errors, whereas the FBD ADCs are not

Keywords

sigma-delta modulation; Hadamard-modulated converters; analog-to-digital converters; channel mismatch errors; frequency-band decomposition converters; multirate theory; sigma-delta modulators; time-interleaved-modulated converters; Analog-digital conversion; Calibration; Delta modulation; Delta-sigma modulation; Digital filters; Frequency conversion; Matrix converters; Matrix decomposition; Noise shaping; Wideband; ADC; Hadamard; analog-to-digital; delta-sigma; modulation; modulator; multirate; parallel; sigma-delta; time-interleaved;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on

Conference_Location

Singapore

Print_ISBN

1-4244-0387-1

Type

conf

DOI

10.1109/APCCAS.2006.342483

Filename

4145425