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1. 发明授权

US06373050B1 Focal plane infrared readout circuit with automatic background suppression 有权
标题翻译：焦平面红外读出电路，具有自动背景抑制功能
公开(公告)号：US06373050B1
公开(公告)日：2002-04-16
申请号：US09414976
申请日：1999-10-07
申请人： Bedabrata Pain , Guang Yang , Chao Sun , Timothy J. Shaw , Chris J. Wrigley
发明人： Bedabrata Pain , Guang Yang , Chao Sun , Timothy J. Shaw , Chris J. Wrigley
IPC分类号： G01V504
CPC分类号： H04N5/361 , G01J1/16 , G01J1/46 , G01J3/2803 , H04N5/33
摘要： A circuit for reading out a signal from an infrared detector includes a current-mode background-signal subtracting circuit having a current memory which can be enabled to sample and store a dark level signal from the infrared detector during a calibration phase. The signal stored by the current memory is subtracted from a signal received from the infrared detector during an imaging phase. The circuit also includes a buffered direct injection input circuit and a differential voltage readout section. By performing most of the background signal estimation and subtraction in a current mode, a low gain can be provided by the buffered direct injection input circuit to keep the gain of the background signal relatively small, while a higher gain is provided by the differential voltage readout circuit. An array of such readout circuits can be used in an imager having an array of infrared detectors. The readout circuits can provide a high effective handling capacity.
摘要翻译：用于从红外检测器读出信号的电路包括具有当前存储器的电流模式背景信号减法电路，其能够在校准阶段期间从红外检测器采样和存储暗电平信号。在成像阶段，从红外检测器接收到的信号中减去当前存储器存储的信号。电路还包括缓冲直接注入输入电路和差分电压读出部分。通过在当前模式下执行大部分背景信号估计和减法，缓冲直接注入输入电路可以提供低增益，以保持背景信号的增益相对较小，而差分电压读出提供更高的增益电路。这种读出电路的阵列可用于具有红外检测器阵列的成像器中。读出电路可以提供高效的处理能力。

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