A 5.22 µW digital-to-analog converter based on I-2I CMOS architecture

Author

Koushaeian, Leila ; Ghafari, Bahram ; Goodarzy, Farhad ; Evans, Roger

Author_Institution

Dept. of Electr. Eng., Univ. Of Melbourne, Melbourne, VIC, Australia

fYear

2013

fDate

17-19 April 2013

Firstpage

285

Lastpage

288

Abstract

This paper discusses the design of a low power metaloxide-semiconductor (MOS)-only current-steering digital to analog converter (DAC) architecture for the realisation of a DAC block of the successive approximation analog to digital converter (ADC) circuit in the retinal prosthesis. Retinal prostheses have great potential for restoring vision to patients suffering from age related macular degeneration (AMD) and retinitis pigmentosa (RP). Here a circuit is proposed and implemented on 65 nm IBM CMOS process, which generates an analog signal from 10-bit digital signal. The circuit consumes 5.22 μW at room temperature from a power supply of the 1.2 V. The new DAC architecture successfully maintains low power consumption and has a significant reduction in layout area for higher bit resolution.

Keywords

CMOS integrated circuits; digital-analogue conversion; integrated circuit design; low-power electronics; DAC; I-2I CMOS architecture; IBM CMOS process; age related macular degeneration; analog signal; analog to digital converter circuit; digital signal; higher bit resolution; low power consumption; low power metaloxide-semiconductor-only current-steering digital to analog converter; power 5.22 muW; retinal prosthesis; retinitis pigmentosa; size 65 nm; voltage 1.2 V; word length 10 bit; Approximation methods; CMOS integrated circuits; Capacitance; Capacitors; Computer architecture; Power demand; Transistors; Biomedical retinal prosthesis; Sub-threshold; analog-to-digital converter; digital-to-analog converter;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON Spring Conference, 2013 IEEE

Conference_Location

Sydney, NSW

Print_ISBN

978-1-4673-6347-1

Type

conf

DOI

10.1109/TENCONSpring.2013.6584457

Filename

6584457