A MOSFET-only, 10 b, 200 ksample/s A/D converter capable of 12 b untrimmed linearity

Author

Hammerschmied, C. ; Qiuting Huang

Author_Institution

Integrated Syst. Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland

fYear

1997

fDate

8-8 Feb. 1997

Firstpage

132

Lastpage

133

Abstract

The linearity of a successive approximation (SA) A/D converter is typically limited by its passive network. Published converters based on capacitive arrays or resistive ladders are limited to around 10 b if no trimming or calibration is used. Although static measurements show that MOS transistors are capable of excellent matching, few MOSFET-only converters achieved more than 10 b accuracy without self-calibration. This A/D converter adopts the current division ladder network based on MOSFETs. Extensive measurements on the MOSFET ladders with different resolutions and geometry establish the achievable linearity.

Keywords

MOSFET circuits; analogue-digital conversion; ladder networks; 10 bit; 12 bit; MOSFET-only circuit; current division ladder network; linearity; successive approximation A/D converter; Calibration; Digital filters; Geometry; Impedance; Laboratories; Linearity; MOSFET circuits; Operational amplifiers; Telecommunications; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1997. Digest of Technical Papers. 43rd ISSCC., 1997 IEEE International

Conference_Location

San Francisco, CA, USA

ISSN

0193-6530

Print_ISBN

0-7803-3721-2

Type

conf

DOI

10.1109/ISSCC.1997.585301

Filename

585301