A 20V-compliance implantable neural stimulator IC with closed-loop power control, active charge balancing, and electrode impedance check

Author

Lei Yao ; Jianming Zhao ; Peng Li ; Rui-Feng Xue ; Yong Ping Xu ; Minkyu Je

Author_Institution

Inst. of Microelectron., A*STAR (Agency for Sci., Technol. & Res.), Singapore, Singapore

fYear

2014

fDate

10-12 Nov. 2014

Firstpage

201

Lastpage

204

Abstract

An inductively powered implantable neural stimulator IC is presented in this paper. It features closed-loop power control, active charge balancing, and electrode impedance check functions. The stimulator IC is powered through 13.56MHz inductive link and supports 33.3kbps bi-directional telemetry with ASK for forward command transmission and LSK for backward data transmission, achieving 20V high compliance voltage, maximum 1.24mA stimulation current, and the resting potential of 50mV. The IC has an active area of 2mm×2mm implemented in 0.18-μm CMOS process with 24V LDMOS option.

Keywords

CMOS integrated circuits; bioelectric potentials; biomedical electronics; closed loop systems; inductive power transmission; neural chips; power control; prosthetics; ASK; CMOS process; LDMOS; LSK; active charge balancing; backward data transmission; bidirectional telemetry; closed-loop power control; current 1.24 mA; electrode impedance; forward command transmission; frequency 13.56 MHz; inductively powered implantable neural stimulator IC; size 0.18 mum; size 2 mm; voltage 20 V; voltage 24 V; voltage 50 mV; Amplitude shift keying; Coils; Electrodes; Impedance; Integrated circuits; Power control; Solid state circuits; Neural stimulator; active charge balancing; closed-loop power control; electrode impedance check; high-compliance-voltage; implantable;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference (A-SSCC), 2014 IEEE Asian

Conference_Location

KaoHsiung

Print_ISBN

978-1-4799-4090-5

Type

conf

DOI

10.1109/ASSCC.2014.7008895

Filename

7008895