Title :
A temperature independent current reference in ROIC
Author :
Tang, Ju ; Wengao Liu ; Chen, Zhongjian ; Cui, Wentao ; Dan Liu ; Zhang, Xiu ; Ji, Lijiu
Author_Institution :
Inst. of Microelectron., Peking Univ., Beijing, China
Abstract :
This paper for the first time describes a programmable and high-precision temperature independent current reference without external component. It is based on SMIC 0.35μm standard CMOS process with the supply voltage of 5V. In simulation results, when temperature changes from -20°C to 100°C, the circuit has a 46μA output current with the variation of 0.1 μA. The current´s accuracy is about 18ppm/°C. It uses TC (temperature coefficient) compensation circuit by adding a positive TC current to a negative TC current. The circuit contains three blocks, and is designed to be used in an uncooled IRFPA ROIC (readout integrated circuit) as a reference current source.
Keywords :
CMOS integrated circuits; compensation; integrated circuit design; reference circuits; -20 C; 0.1 muA; 0.35 micron; 100 C; 46 muA; 5 V; CMOS process; IRFPA; SMIC standard; TC current; compensation circuit; readout integrated circuit; supply voltage; temperature coefficient compensation; temperature independent current reference; Adders; Bipolar transistors; Circuits; MOS devices; Mirrors; Photonic band gap; Resistors; Tellurium; Temperature; Voltage;
Conference_Titel :
Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on
Print_ISBN :
0-7803-8511-X
DOI :
10.1109/ICSICT.2004.1436858
