Switching sequence optimization for gradient error compensation in thermometer-decoded DAC arrays

Author

Cong, Yonghua ; Geiger, Randall L.

Author_Institution

Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA

Volume

47

Issue

7

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

585

Lastpage

595

Abstract

This paper discusses switching schemes for gradient error compensation in unary (thermometer-decoded) arrays of digital-to-analog converters (DACs). The absolute lower bound of integral nonlinearity (INL) by optimizing switching sequences is established and optimal switching sequences that meet the lower bound of INL are presented for linear error compensation in one-dimensional arrays. A rapidly converging algorithm is developed to obtain INL bounded switching sequences for any given type of gradient error compensation. Simulation results show that the new switching sequences substantially reduce the nonlinearity of DACs due to gradient errors

Keywords

circuit optimisation; digital-analogue conversion; error compensation; gradient error compensation; integral nonlinearity; linear error compensation; one-dimensional arrays; rapidly converging algorithm; switching sequence optimization; thermometer-decoded DAC arrays; Decoding; Digital-analog conversion; Error compensation; Error correction; Integral equations; Integrated circuit interconnections; Latches; Linearity; Switches; Switching converters;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.850417

Filename

850417