Modified mismatch-shaping for continuous-time delta-sigma modulators

Author

Shui, Tao ; Schreier, Richard ; Hudson, Foi-rest

Author_Institution

Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA

fYear

1998

fDate

11-14 May 1998

Firstpage

225

Lastpage

228

Abstract

By noise-shaping the error caused by element mismatch in a multi-bit DAC, mismatch-shaping allows multi-bit quantizers to be used in ΔΣ ADCs and DACs without sacrificing the inherent linearity of single-bit architectures. Unfortunately, mismatch-shaping turns the DAC elements on and off frequently and thus accentuates dynamic effects. By taking into account the effects of element switching, “modified mismatch shaping” yields a continuous-time ΔΣ DAC whose performance is insensitive to both element mismatch and element switching dynamics. Experimental results confirm the effectiveness of the technique

Keywords

continuous time systems; delta-sigma modulation; errors; modulators; ΔΣ DACs; continuous-time delta-sigma modulators; dynamic effects; element mismatch error; element switching; modified mismatch-shaping; multi-bit DAC; multi-bit quantizers; single-bit architectures; Calibration; Delta modulation; Jitter; Linearity; Logic; Noise shaping; Protection; Quantization; Sampling methods; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 1998. Proceedings of the IEEE 1998

Conference_Location

Santa Clara, CA

Print_ISBN

0-7803-4292-5

Type

conf

DOI

10.1109/CICC.1998.694968

Filename

694968