摘要
提出了一种应用于红外焦平面阵列的新结构相关双采样保持电路。通过片外的积分和相关双采样结构 ,不仅减小了电路的固定模式噪声和 KTC开关噪声 ;而且选中的一行中的所有像元能同时开始积分 ;信号的读出过程发生在下一行的选通期间 ,这有利于提高帧频 ;电路的输出信号是箱型波 ,则有利于模数转换。SPICE模拟结果表明 ,本文提出的新结构基相关双采样保持电路具有结构简单、功耗小、驱动信号源少。
In this paper, a novel CMOS correlated double sampling (CDS) structure for focal plane array (FPA) is proposed. Through the improved shared off FPA integration and CDS structure, the fixed pattern noise (FPN) and KTC reset noise are reduced greatly; all pixels in the selected row can start to integrate simulataneously; the readout process happens in the next row selection time, which can increase the frame frequency greatly; and the output waveform is boxcar, which is very easy to realize analog/digital conversion (ADC); SPICE simulation results have shown that the proposed novel CDS structure can achieve simple driving signal and circuit structure, and large dynamic range in large format FPA with samll power consumption.
出处
《光电子技术》
CAS
2003年第3期154-159,164,共7页
Optoelectronic Technology
基金
国家自然科学基金资助项目 ( No.60 0 770 2 5 )
