Title :
A Low-Temperature-Drift High-Precision Band-Gap Reference Current Source
Author :
Wu Lan ; Zang Hai-he
Author_Institution :
Coll. of Electr. Eng., Henan Univ. of Technol., Zhengzhou, China
Abstract :
A Low-Temperature-Drift High-precision band-gap reference current source is developed. A reference voltage is generated by using the positive and negative characteristic of the crystal triode itself. The Power Supply Rejection Ratio is improved by using an operational amplifier which constitutes the degenerate loop. The temperature effect on the band-gap current is reduced by using an off chip resistor. The experiment results show that the temperature coefficient of the band-gap current source is 8.7×10-6/°C and it works well within 2.6V-4V power supply.
Keywords :
CMOS integrated circuits; constant current sources; energy gap; operational amplifiers; crystal triode; degenerate loop; low-temperature-drift high-precision band-gap reference current source; off chip resistor; operational amplifier; power supply rejection ratio; reference voltage; temperature coefficient; voltage 2.6 V to 4 V; CMOS integrated circuits; CMOS technology; Photonic band gap; Power supplies; Resistance; Simulation; Temperature;
Conference_Titel :
Control, Automation and Systems Engineering (CASE), 2011 International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4577-0859-6
DOI :
10.1109/ICCASE.2011.5997713
