A high‐order curvature‐compensated subthreshold voltage reference is proposed in this paper. The proposed curvature‐compensated voltage reference consists of two supply‐independent first‐order voltage references and a curvature compensation circuit. The supply‐independent first‐order voltage reference uses a negative feedback loop which improves the line sensitivity and eliminates the demand of operational amplifier, whereas the curvature compensation circuit provides high‐order temperature‐compensated output reference voltage. The proposed curvature‐compensated voltage reference provides an output reference voltage of 118.54 mV with a temperature coefficient of 21.5 ppm/°C over a wide temperature range of −60°C to 120°C. The power supply rejection ratio and line sensitivity are observed as −68.64 dB (for the frequency range of 1 Hz to 100 Hz) and 0.035%/V (for the supply voltage varies from 0.85 V to 2.5 V), respectively. The values of output noise at the frequencies of 1 kHz and 10 kHz without using any capacitive filter are obtained as 179.13 nV/ √ Hz and 123.87 nV/ √ Hz, respectively.

中文翻译：

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低温系数和低线路灵敏度亚阈值曲率补偿电压参考

本文提出了一种高阶曲率补偿的亚阈值电压基准。拟议的曲率补偿电压基准由两个与电源无关的一阶电压基准和一个曲率补偿电路组成。独立于电源的一阶电压基准使用负反馈环路，该负反馈环路提高了线路灵敏度并消除了运算放大器的需求，而曲率补偿电路则提供了高阶温度补偿的输出基准电压。所提出的曲率补偿的电压基准提供118.54毫伏21.5 ppm的/温度系数的输出参考电压℃下在宽的温度范围为-60 ℃下，以120 ℃的。电源抑制比和线路灵敏度分别为−68.64 dB（对于1 Hz至100 Hz的频率范围）和0.035 ％/ V（针对电源电压在0.85 V至2.5 V之间变化）。在不使用任何电容滤波器的情况下，在1 kHz和10 kHz频率下的输出噪声值分别为179.13 nV /√Hz和123.87nV /√Hz。