Abstract
A low drift current reference based on PMOS temperature correction technology is proposed. To achieve the minimum temperature coefficient (TC), the PMOS cascode current mirror is designed as a cross structure. By exchanging the bias for two layers of the self-biased PMOS cascode structure, the upper PMOS, which is used to adjust the TC together with the resistor of the self-biased PMOS cascode structure, is forced to work in the linear region. As the proposed current reference is the on-chip current reference of a high voltage LED driver with high accuracy, it was designed using a CSMC 1 μm 40 V BCD process. Simulation shows that the TC of the reference current was only 23.8×10−6/°C over the temperature range of −40–120 °C under the typical condition.
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References
Babu, V.S., Haseena, P.S., Baiju, M.R., 2010. A Floating Gate MOSFET Based Current Reference with Subtraction Technique. IEEE Computer Society Annual Symp. on VLSI, p.206–209. [doi:10.1109/ISVLSI.2010.52]
Behzad, R., 2005. Design of Analog CMOS Integrated Circuits. Tsinghua University Press, Beijing, China, p.313–314 (in Chinese).
Chun, H., Lehmann, T., 2010. CMOS Current Reference Generator Using Integrated Resistors. Int. Conf. on Electronics and Information Engineering, p.290–294. [doi:10. 1109/ICEIE.2010.5559872]
Khan, Q.A., Wadhwa, S.K., Misri, K., 2003. A Low Voltage Switched-Capacitor Current Reference Circuit with Low Dependence on Process, Voltage and Temperature. Proc. 16th Int. Conf. on VLSI Design, p.504–506. [doi:10.1109/ICVD.2003.1183184]
Osaki, Y., Hirose, T., Kuroki, N., Numa, M., 2010. Nano-Ampere CMOS Current Reference with Little Temperature Dependence Using Small Offset Voltage. 53rd IEEE Int. Midwest Symp. on Circuits and Systems, p.668–671.
Serrano, G., Hasler, P., 2008. A precision low-TC wide-range CMOS current reference. IEEE J. Sol.-State Circ., 43(2): 558–565. [doi:10.1109/JSSC.2007.914336]
Yang, B.D., Shin, Y.K., Lee, J.S., Lee, Y.K., Ryu, K.C., 2009. An Accurate Current Reference Using Temperature and Process Compensation Current Mirror. IEEE Asian Solid-State Circuits Conf., p.241–244. [doi:10.1109/ASSCC.2009.5357223]
Yang, W.B., Huang, Z.Y., Cheng, C.T., Lo, Y.L., 2011. Temperature Insensitive Current Reference for the 6.27 MHz Oscillator. 13th Int. Symp. on Integrated Circuits, p.559–562. [doi:10.1109/ISICir.2011.6131924]
Yoo, C., Park, J., 2007. CMOS current reference with supply and temperature compensation. Electron. Lett., 43(25): 1422–1424. [doi:10.1049/el:20072528]
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Ye, Yd., He, Ln. & Shen, Yd. New Technique: A low drift current reference based on PMOS temperature correction technology. J. Zhejiang Univ. - Sci. C 13, 937–943 (2012). https://doi.org/10.1631/jzus.C1200112
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DOI: https://doi.org/10.1631/jzus.C1200112