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

fYear

2010

fDate

May 30 2010-June 2 2010

Firstpage

845

Lastpage

848

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.2010.5537432

Filename

5537432