Abstract
A sub-1V bandgap reference (BGR) featuring with low offset is proposed. In order to reduce the effect of the offset of the operation amplifiers, the proposed BGR introduces feedback paths to not only realize sub-1V output but also reduce the factor of operation amplifier’s offset voltage. In addition, a cross-coupled structure is dedicated to reduce the offset voltage factor further by increasing the bipolar junction transistor’s base emitter voltage difference. The new proposed offset-compensated BGR has been successfully verified in a 0.5 μm BCD process. The relative accuracy is increased by 4 times compared with the conventional circuit. Furthermore, the proposed circuit achieves a temperature coefficient of 8.5 ppm/°C over a wide temperature range of −20 to 120 °C, power supply rejection ratio of more than 70 dB at low frequencies and a line regulation of 0.09 % easily, without requiring additional operational amplifiers or complex circuits.
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References
Pertijs, M. A., & Kindt, W. J. (2010). A 140 dB-CMRR current feedback instrumentation amplifier employing ping-pong auto-zeroing and chopping. IEEE Journal of Solid-State Circuits, 45(10), 2044–2056.
Fayomi, C. J. B., Wirth, G. I., Achigui, H. F., & Matsuzawa, A. (2010). Sub-1V CMOS bandgap reference design techniques: A survey. Analog Integrated Circuits and Signal Processing, 62(2), 141–157.
Razavi, B. (2012). Design of Analog Integrated circuits. New York: McGraw-Hill.
Xu, C., Chao, S., & Mansun, J. (2002). A new correlated double sampling (CDS) technique for low voltage design environment in advanced CMOS technology. Europe Solid-State Circuits Conference, 43, 117–120.
Chen, J. G., Li, G. L., & Cheng, Y. H. (2012). Low power offset cancellation switched capacitor correlated double sampling bandgap reference. Electronics Letters, 48(14), 821–822.
Enz, C. C., & Temes, G. C. (1996). Circuit techniques for reducing the effects of op-amp imperfections: Auto-zeroing, correlated double sampling, and chopper stabilization. Proceedings of the IEEE, 84(11), 1584–1614.
Banba, H., Shiga, H., Umezawa, A., Miyaba, T., Tanzawa, T., Atsumi, S., et al. (1999). A CMOS bandgap reference circuit with sub-1V operation. IEEE Journal of Solid-State Circuits, 34(5), 670–674.
Allen, P. E., & Holberg, D. R. (2002). CMOS analog circuit design. Oxford: Oxford University Press.
Boni, A. (2002). Op-amps and startup circuits for CMOS bandgap references with near 1–V supply. IEEE Journal of Solid-State Circuits, 37(10), 1339–1343.
Leung, K. N., & Mok, P. K. (2002). A sub-1–V 15-ppm/°C CMOS bandgap voltage reference without requiring low threshold voltage device. IEEE Journal of Solid-State Circuits, 37(4), 526–530.
Malcovati, P., Maloberti, F., Fiocchi, C., & Pruzzi, M. (2001). Curvature-compensated BiCMOS bandgap with 1–V supply voltage. IEEE Journal of Solid-State Circuits, 36(7), 1076–1081.
Navarro, J., Ishibe, E. (2011). A simple CMOS bandgap reference circuit with sub-1–V operation. Circuits and Systems (ISCAS), 2011. IEEE International Symposium, (pp. 2289–2292).
Acknowledgments
Project supported by the Program for New Century Excellent Talents in University of China (NCET-10-0331), National Natural Science Foundation of China (61204083) and the Natural Science Foundation of the Jiangsu province of China (BK2012204, BY2011146).
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Zhang, Yw., Zhu, J., Sun, Wf. et al. A novel sub-1V bandgap reference with offset compensated techniques. Analog Integr Circ Sig Process 78, 391–397 (2014). https://doi.org/10.1007/s10470-013-0178-8
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DOI: https://doi.org/10.1007/s10470-013-0178-8