It is a large-scale mixed-signal circuit with time-delay integration ( TDI) function to enhance the signal to noise ratio ( S/ N), and defective element deselection ( DED) function to decrease the probability of bad columns. 该读出电路是一个大规模混合信号电路,集成了时间延迟积分以提高信噪比,实现了缺陷像素剔除以提高阵列的可靠性。