High Precision Low Temperature Coefficient Current Reference with Resistor Compensation

DOI

10.2991/iccasm.2012.325How to use a DOI?

Keywords

Current reference, Resistor compensation, Trimming network, Temperature coefficient

Abstract

In order to improve temperature characteristics and precision of current reference, a novel resistor compensated current reference based on bandgap voltage reference with trimming network is proposed in this paper. By introducing the combination of 2nd order resistor and transmission gate whose temperature characteristics compensate that of bandgap voltage reference, lower temperature coefficient has been achieved. This circuit is implemented using HHNEC 0.35um BCD process with 3.3V power supply. Simulation results for the proposed current reference show the worst temperature coefficient of 15.25ppm/°C and the best temperature coefficient of 5ppm/°C over a temperature range from -45°C to 85°C. With trimming network, an output current variation of 1.4‰ is achieved among process corners. On the premise of not introducing high-order curvature compensated to bandgap which increase circuit complexity, this circuit put forward a new thought for the design of current reference.

Copyright

© 2012, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiaoning Xin
AU  - Bingyin Luo
PY  - 2012/08
DA  - 2012/08
TI  - High Precision Low Temperature Coefficient Current Reference with Resistor Compensation
BT  - Proceedings of the 2012 International Conference on Computer Application and System Modeling (ICCASM 2012)
PB  - Atlantis Press
SP  - 1275
EP  - 1279
SN  - 1951-6851
UR  - https://doi.org/10.2991/iccasm.2012.325
DO  - 10.2991/iccasm.2012.325
ID  - Xin2012/08
ER  -