Title :
Ultralow-power temperature-insensitive current reference circuit
Author :
Hirose, Tetsuya ; Asai, Tetsuya ; Amemiya, Yoshihito ; Matsuoka, Toshimasa ; Taniguchi, Kenji
Author_Institution :
Dept. of Electr. Eng., Hokkaido Univ., Sapporo
fDate :
Oct. 30 2005-Nov. 3 2005
Abstract :
An ultralow power constant reference current circuit with low temperature dependence for micropower electronic applications is proposed in this paper. This circuit consists of a constant-current subcircuit and a bias-voltage subcircuits, and it compensates for the temperature characteristics of mobility thermal voltage VT, and threshold voltage VTH in such a way that the reference current has small temperature dependence. A SPICE simulation demonstrated that reference current and total power dissipation is 97.7nA, 1.1mu W, respectively, and the variation in the reference current can be kept very small within +4% in a temperature range from -20 to 100 degC
Keywords :
cryogenic electronics; current-mode circuits; low-power electronics; reference circuits; -20 to 100 C; 1.1 muW; 97.7 nA; bias-voltage subcircuit; constant-current subcircuit; low temperature dependence; micropower electronic application; mobility thermal voltage; ultralow power constant reference current circuit; ultralow-power current reference circuit; Circuit simulation; Information systems; Intelligent sensors; Power dissipation; Resistors; SPICE; Temperature dependence; Temperature distribution; Temperature sensors; Threshold voltage;
Conference_Titel :
Sensors, 2005 IEEE
Conference_Location :
Irvine, CA
Print_ISBN :
0-7803-9056-3
DOI :
10.1109/ICSENS.2005.1597922
