Implementation of current-to-voltage converter with wide dynamic range and its application

Author

Park, Jae-Hyoun ; Hahn, Cheol-Koo ; Yoon, Hyung-Do

Author_Institution

Green Energy Res. Center, Korea Electron. Technol. Inst., Seongnam, South Korea

fYear

2009

Firstpage

500

Lastpage

503

Abstract

A current-to-voltage converter (CVC) with wide dynamic range and good linearity is presented, which consists of a trans-impedance amplifier (TIA), an adjusting current generator, and two ADCs. Main algorithm of the CVC is two-step conversion. First, a rough location of an input current is traced using one ADC, a coarse-ADC with N-bit resolution, and the input current shifts to the linear region of the TIA by current subtraction. Next, the other ADC converters the TIA output which corresponds to the shifted current. This converter is implemented using a 0.35 Â¿m CMOS technology. Measurement results indicate that a maximum linear input current is enlarged by 2N times.

Keywords

CMOS integrated circuits; analogue-digital conversion; mixed analogue-digital integrated circuits; operational amplifiers; ADC converters; CMOS mixed-signal technology; N-bit resolution; TIA; adjusting current generator; coarse-ADC; current subtraction; current-to-voltage converter; maximum linear input current; size 0.35 mum; transimpedance amplifier; Amperometric sensors; CMOS technology; Circuit synthesis; Current measurement; Dynamic range; Linearity; Signal design; Signal generators; Signal resolution; Voltage; CVC; TIA; adjusting current; linearity; wide dynamic range;

fLanguage

English

Publisher

ieee

Conference_Titel

SoC Design Conference (ISOCC), 2009 International

Conference_Location

Busan

Print_ISBN

978-1-4244-5034-3

Electronic_ISBN

978-1-4244-5035-0

Type

conf

DOI

10.1109/SOCDC.2009.5423832

Filename

5423832