Linzhi Tao, Haoyu Zhuang, Leiting Chen, Yizhan Li, Qiang Li

A novel curvature‐correction technique insensitive to process variations

  • Electrical and Electronic Engineering
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AbstractThis paper proposes a novel curvature‐correction technique insensitive to process variations, which can be used in not only the bandgap reference (BGR) circuit but also the Zener reference circuit. By using two BJT transistors to form a differential pair structure, the current difference between the differential pair generates a compensation current, which compensates for the non‐linearity in the reference voltage. Unlike the classic curvature‐correction technique which can only be used in the BGR circuit, this novel technique can be used in the Zener reference circuit as well. What is more, the proposed curvature‐correction technique is insensitive to process variations, which greatly increases the reliability of commercial products. Finally, simulation results verify the validity of the proposed technique.

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