Title :
A high performance CMOS reference current generator with negative feedback loop for biomedical neural stimulator
Author :
Lim, Kyomuk ; Seo, Jindeok ; Ko, Hyoungho
Author_Institution :
Grad. Sch. of Adv. Electron. Circuit Substrate Eng., Chungnam Nat. Univ., Daejeon, South Korea
Abstract :
This paper presents a novel current reference circuit with negative feedback loop for biomedical neural current stimulator using the mutual compensation of threshold voltage and mobility. The negative feedback loop in this circuit effectively reduces the sensitivity both to the process and temperature variations. The nominal current output is designed to be 4 μA, and the temperature coefficient is 312 ppm/°C over temperature range of -45 °C to 125 °C. The simulated worst case variation at 25 °C is 0.75 μA.
Keywords :
CMOS integrated circuits; biomedical electronics; biomedical equipment; circuit feedback; neuromuscular stimulation; reference circuits; sensitivity; biomedical neural current stimulator; current 0.75 muA; current 4 muA; current reference circuit; high performance CMOS reference current generator; mobility; negative feedback loop; nominal current output; process variations; sensitivity; temperature -45 degC to 125 degC; temperature variations; threshold voltage; CMOS integrated circuits; Educational institutions; MOS devices; Negative feedback; Photonic band gap; Temperature sensors; Threshold voltage; Negative Feedback; Reference Current Generator; Temperature Compensation;
Conference_Titel :
Control, Automation and Systems (ICCAS), 2012 12th International Conference on
Conference_Location :
JeJu Island
Print_ISBN :
978-1-4673-2247-8
