A novel approach to calibrate open-loop amplifier nonlinearities through piecewise linear interpolation

Author

Gong Yuehong ; Luo Min ; Yu Mingyan ; Ma Jianguo ; Mao Ze

Author_Institution

Dept. of Micro-Electron. & Solid-State Electron., Harbin Inst. of Technol., Harbin, China

fYear

2012

fDate

Oct. 29 2012-Nov. 1 2012

Firstpage

1

Lastpage

3

Abstract

A new digitally assisted background calibration method, applying piecewise linear interpolation instead of ROM and LUT, is presented. The method aims to correct the linear and nonlinear errors introduced by the inter-stage open-loop amplifier. Data approach is adopted to achieve third order error compensation, without applying of ROM and LUT. The calibration algorithm is verified in a 12 bits 40MHz pipeline ADC, the ADC is simulated under Global Foundry 0.18um CMOS technology. Simulation results show that, the algorithm converges in 500 samples. By applying the calibration, the DNL improves 0.25LSB, INL improves 18LSB, SFDR changes from 36.1dB to 78.8dB.

Keywords

CMOS integrated circuits; amplifiers; analogue-digital conversion; calibration; interpolation; piecewise linear techniques; CMOS technology; calibration algorithm; digitally assisted background calibration method; interstage open-loop amplifier; open-loop amplifier nonlinearity calibration; piecewise linear interpolation; pipeline ADC; size 0.18 mum; Calibration; Heuristic algorithms; Interpolation; Nickel; Pipelines; Read only memory; Table lookup;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4673-2474-8

Type

conf

DOI

10.1109/ICSICT.2012.6467888

Filename

6467888