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本文提出了一种用于长波红外焦平面阵列的像素级并行光驱动20位电流-相位ADC读出电路,通过避免传统模拟电路干扰,实现了低功耗(6.9mW)、高动态范围(120.4dB)和低噪声等效温差(2.2mK)。该设计有效提升了信号噪声比,适用于低温红外成像应用。
Technical Physics Chinese Academy of Sciences, Shanghai, China 1 2 Long-wavelength (LW) cryogenic (from 80 down to 40K) infrared focal plane arrays (IRFPAs) are extensively employed because of their sensitivity and rapid response. Readout circuits (ROIC) with high dynamic range (HDR) can significantly improve the signal-to-noise ratio (SNR) of LW-IRFPAs due to enhancement of well capacity. However, neither conventional current-voltage nor current-frequency modulation can avoid analog circuits, making the ROIC susceptible to interference [1-8]. In these ROICs, active analog circuits are usually the primary power consumption item. Moreover, the long data transfer bus with a high swing across the pixels consumes power and introduces crosstalk. To address these
Yi Zhuo1, Hangyu Lu2, Ding Ma3, Zheng Zhou1, Linxiao Shen1, Yacong Zhang1,
Zhongjian Chen1, Xixin Cao1, Yimao Cai1, Ning Li2,3, Wengao Lu1 Peking University, Beijing, China University of Chinese Academy of Sciences, Hangzhou, China 3 Shanghai Institute of