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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Averaging Pixel Current Adjustment Technique for Reducing Fixed Pattern Noise in the Bolometer-Type Uncooled Infrared Image Sensor
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Averaging Pixel Current Adjustment Technique for Reducing Fixed Pattern Noise in the Bolometer-Type Uncooled Infrared Image Sensor

机译：平均像素电流调整技术可降低Bolometer型非制冷红外图像传感器中的固定模式噪声

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摘要

In this paper, we propose an averaging pixel current adjustment technique for reducing fixed pattern noise (FPN) in the bolometer-type uncooled infrared image sensor. The averaging pixel current adjustment technique is composed of active pixel, reference pixel, and calibration circuit. Polysilicon resistors were used in each active pixel and reference pixel. Resistance deviation among active pixels integrated with the same resistance value cause FPN. The principle of the averaging pixel current adjustment technique for removing FPN is based on the subtraction of dark current of the active pixel from the dark current of the reference pixel. The subtracted current is converted into the voltage, which contains pixel calibration information. The calibration circuit is used to adjust the calibration current. After calibration, the nano-ampere current is output with small deviation. The proposed averaging pixel current adjustment technique is implemented by a chip composed of a pixel array, a calibration circuit, average current generators, and readout circuits. The chip was fabricated using a standard 0.35 μm CMOS process and its performance was evaluated.
机译：在本文中，我们提出了一种平均像素电流调整技术，以减少辐射热计型非制冷红外图像传感器中的固定模式噪声（FPN）。平均像素电流调整技术由有源像素，参考像素和校准电路组成。在每个有源像素和参考像素中都使用了多晶硅电阻器。集成有相同电阻值的有源像素之间的电阻偏差会导致FPN。用于去除FPN的平均像素电流调整技术的原理是基于从参考像素的暗电流中减去有源像素的暗电流。减去的电流被转换为电压，该电压包含像素校准信息。校准电路用于调整校准电流。校准后，以很小的偏差输出纳安电流。所提出的平均像素电流调节技术是通过由像素阵列，校准电路，平均电流发生器和读出电路组成的芯片实现的。该芯片使用标准的0.35μmCMOS工艺制造，并对其性能进行了评估。

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