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首页> 外文期刊>Journal of Circuits, Systems, and Computers >A High-Precision Bandgap Voltage Reference with Automatic Curvature-Compensation Technique
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A High-Precision Bandgap Voltage Reference with Automatic Curvature-Compensation Technique

机译：具有自动曲率补偿技术的高精度带隙基准电压源

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摘要

A high-precision bandgap voltage reference (BGR) with a novel curvature-compensation scheme is proposed in this paper. The temperature coefficient (TC) can be automatically optimized with a built-in adaptive curvature-compensation technique, which is realized in a digitization control way. An exponential curvature-compensation method is first adopted to reduce the TC in a certain degree, especially in low temperature range. Then, the temperature drift of BGR in higher temperature range can be further minimized by dynamic zero-temperature-coefficient point tracking (ZTCPT) with temperature changes. With the help of proposed adaptive signal processing, the output voltage of BGR can approximately maintain zero TC in a wider temperature range. Verification results of the BGR proposed in this paper, which is implemented in 0.35-mu m BiCMOS process, illustrate that the TC of 1.4 ppm/degrees C is realized under the power supply voltage of 3 V and the power supply rejection of the proposed circuit is -65 dB without any filter capacitor.
机译：提出了一种具有新颖曲率补偿方案的高精度带隙基准电压源（BGR）。温度系数（TC）可以通过内置的自适应曲率补偿技术自动优化，该技术以数字化控制方式实现。首先采用指数曲率补偿方法将TC降低一定程度，尤其是在低温范围内。然后，通过随温度变化的动态零温度系数点跟踪（ZTCPT），可以进一步减小BGR在较高温度范围内的温度漂移。借助建议的自适应信号处理，BGR的输出电压可以在较宽的温度范围内大致保持零TC。本文提出的BGR的验证结果是在0.35微米的BiCMOS工艺中实现的，表明在3 V的电源电压和拟议电路的电源抑制条件下，可实现1.4 ppm /℃的TC不带任何滤波电容时为-65 dB。

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