Title :
A resistor-free temperature-compensated CMOS current reference
Author :
Liu, Wei ; Khalil, Waleed ; Ismail, Mohammed ; Kussener, Edith
Author_Institution :
Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
May 30 2010-June 2 2010
Abstract :
This paper presents a resistor-free temperature compensated CMOS current reference designed in a standard 0.18 μm CMOS process. The temperature compensation scheme is achieved by combining a PTC (Positive Temperature Coefficient) current generator circuit with a NTC (Negative Temperature Coefficient) current generator circuit. The proposed design is shown to be less sensitive to process and temperature variations and well suited for integration into other circuits as an accurate and stable current source. Simulation results for the proposed current reference show a temperature coefficient of 170 ppm/°C over a temperature range of 20 °C to 120 °C and an output current variation of 3% over a power supply range of 2 V to 3 V.
Keywords :
CMOS integrated circuits; compensation; reference circuits; current generator circuit; output current variation; positive temperature coefficient; resistor-free temperature compensated CMOS current reference; size 0.18 mum; temperature 20 degC to 120 degC; temperature variations; voltage 2 V to 3 V; CMOS process; Charge pumps; Circuit simulation; Photonic band gap; Resistors; Silicon; Temperature dependence; Temperature distribution; Temperature sensors; Voltage;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537432
