A Wide Tuning Range CMOS Oscillator for an Optoelectronic Retinal Prosthesis System

Author

Huang, Yan ; Drakakis, Emmanuel M. ; Toumazou, Chris

Author_Institution

Dept. of Bioeng., Imperial Coll., London

fYear

2007

fDate

27-30 May 2007

Firstpage

2359

Lastpage

2362

Abstract

This paper proposes a miniaturized optoelectronic system suitable for the optical stimulation of genetically engineered retinal ganglion cells (RGCs) and focuses upon the synthesis and performance characteristics of a key circuit component needed for the programmable stimulator chip of the system: a wide tuning range voltage-controlled oscillator (VCO). The paper elaborates the synthesis and performance of a novel OTA structure which is used for the realisation of the needed wide tuning range VCO. The VCO has been designed and fabricated in AMS 0.35mum CMOS technology. Simulation results reveal a tuning range of more than 6 decades (70mHz to 0.2MHz).

Keywords

CMOS integrated circuits; biomedical electronics; eye; integrated optoelectronics; operational amplifiers; programmable circuits; prosthetics; voltage-controlled oscillators; 0.35 micron; CMOS technology; genetically engineered retinal ganglion cells; miniaturized optoelectronic system; operational transconductance amplifier; optical stimulation; optoelectronic retinal prosthesis system; programmable stimulator chip; voltage-controlled oscillator; wide tuning range CMOS oscillator; CMOS technology; Circuit optimization; Circuit synthesis; Genetic engineering; Optical devices; Optical tuning; Prosthetics; Retina; Stimulated emission; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on

Conference_Location

New Orleans, LA

Print_ISBN

1-4244-0920-9

Electronic_ISBN

1-4244-0921-7

Type

conf

DOI

10.1109/ISCAS.2007.377933

Filename

4253149