A high-impedance microelectrode driver dedicated for visual intracortical microstimulation

Author

Hasanuzzaman, Md ; Raut, Rabin ; Sawan, Mohamad

Author_Institution

Polystim Neurotechnologies Lab., Polytech. Montreal, Montreal, QC, Canada

fYear

2012

fDate

5-8 Aug. 2012

Firstpage

222

Lastpage

225

Abstract

We present in this paper a high-impedance microelectrode driver dedicated for visual intracortical microstimulation. This highly-configurable output stage is able to deliver eight bipolar or sixteen monopolar stimulation simultaneously with a constant current amplitude. The maximum stimulation current is set to 100μA which reaches 98??A through a 100kΩ impedance in the post-layout simulation results. The system is designed in DALSA 0.8μm 5V/20V CMOS/DMOS technology to meet the high-voltage compliance across electrode-tissue interface impedance. The driver circuit features a new on-chip 32-bit serial-in parallel-out shift register along with the new forbidden state logic circuits for generating the control signals for the switch matrix. The quiescent power consumption of the system is 316μW. Voltage compliance of 10V across the resistor of 100kΩ has been achieved for ±10V supplies.

Keywords

CMOS integrated circuits; biological tissues; biomedical electronics; circuit layout; circuit simulation; driver circuits; logic circuits; microelectrodes; shift registers; DALSA CMOS-DMOS technology; bipolar stimulation; current 100 muA; current 98 muA; driver circuit; electrode-tissue interface impedance; forbidden state logic circuit; high-impedance microelectrode driver; high-voltage compliance; monopolar stimulation; on-chip serial-in parallel-out shift register; post-layout simulation result; power 316 muW; quiescent power consumption; resistance 100 kohm; size 0.8 mum; switch matrix; visual intracortical microstimulation; voltage 10 V; voltage 20 V; voltage 5 V; word length 32 bit; Impedance; Microelectrodes; Registers; Switches; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2012 IEEE 55th International Midwest Symposium on

Conference_Location

Boise, ID

ISSN

1548-3746

Print_ISBN

978-1-4673-2526-4

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2012.6291997

Filename

6291997