Novel Charge-Metering Stimulus Amplifier for Biomimetic Implantable Prosthesis

Author

Fang, Xiang ; Wills, Jack ; Granacki, John ; LaCoss, Jeff ; Arakelian, Artak ; Weiland, James

Author_Institution

Inf. Sci. Inst., Southern California Univ., Los Angeles, CA

fYear

2007

fDate

27-30 May 2007

Firstpage

569

Lastpage

572

Abstract

A novel charge-metering stimulus amplifier is proposed for high performance neural prosthesis stimulation. The new charge-based approach with feedback has low charge error 0.5%, low charge imbalance 0.2%, and high power efficiency. Charge-metering stimulus amplifier can be implemented using advanced 0.18mum CMOS technology and is compatible with mixed-signal system-on-a-chip (SoC) implantable devices. It also has the capability to monitor the electrode-tissue contact quality and estimate the interface impedance in real-time for robust stimulation.

Keywords

CMOS integrated circuits; amplifiers; prosthetics; system-on-chip; 0.18 micron; CMOS technology; biomimetic implantable prosthesis; charge-metering stimulus amplifier; neural prosthesis stimulation; system-on-chip; Biomedical electrodes; Biomimetics; CMOS technology; Capacitors; Circuits; Electrical stimulation; Impedance; Prosthetics; Retina; Voltage;

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.2007.378801

Filename

4252698