Journal Metrics
Impact Factor: 1.211
ISSN Print: 1609-0985
ISSN Online: 2199-4757
Imprint: Springer
Journal Content Search
latest updated: 2015 / 07 / 30
A New Microstimulator with Pulse Width Modulation
Wen-Yaw Chung, 
Chiung-Cheng Chuang, 
Yu-Liang Liao, 
Cheng-Wen Chang
Abstract
A novel implantable microstimulator has been designed, fabricated, and characterized. The pulse width modulation (PWM) has been used to control the output current source for changing the duration of output waveform. The frequency of output stimulus current can be controlled by a Schmitt trigger based relaxation oscillator. Finally, the intensity of output stimulus current can be programmed by a 5-bit digital code. This circuitry can operate in only 2.5V low voltage to improve the disadvantage of conventional microstimulator that is not suitable in low voltage. In the architecture of circuitry, it reduces the circuit complexity formed by typical microstimulators adopting mircoprocessors as the control unit. The measured results of the proposed microstimulator chip show that this system is quite feasible for different stimulus modes including regular, random and burst modes. This circuitry has been simulated with HSPICE and fabricated in a 0.35μm 2P4M CMOS process.
Full Text:  PDF   
Home | Editorial Board | Archives | Special Issue | News | Contact | About JMBE | 08152691
National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan (R.O.C.)
phone: (+886)-2-3366-1868     fax: (+886)-2-33551687     E-mail:jmbeoffice@gmail.com
Copyright ◎ 2015 Journal All rights reserved