Offset compensation in comparators with minimum input-referred supply noise

Author

Wong, Koon-Lun Jackie ; Yang, Chih-Kong Ken

Author_Institution

Univ. of California, Los Angeles, CA, USA

Volume

39

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

837

Lastpage

840

Abstract

The resolution of a comparator is determined by the dc input offset and the ac noise. For mixed-mode applications with significant digital switching, input-referred supply noise can be a significant source of error. This paper proposes an offset compensation technique that can simultaneously minimize input-referred supply noise. Demonstrated with digital offset compensation, this scheme reduces input-referred supply noise to a small fraction (13%) of one least significant bit (LSB) digital offset. In addition, the same analysis can be applied to analog offset compensation.

Keywords

CMOS integrated circuits; circuit optimisation; comparators (circuits); compensation; integrated circuit noise; ac noise; analog offset compensation; comparators; dc input offset; digital offset compensation; digital switching; minimum input-referred supply noise; mixed-mode applications; Bandwidth; CMOS technology; Circuit noise; Feedback; Noise cancellation; Noise reduction; Quantization; Random variables; Testing; Threshold voltage;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2004.826317

Filename

1291689