Photodetecting circuit
    35.
    发明授权
    Photodetecting circuit 失效
    光电检测电路

    公开(公告)号:US07990450B2

    公开(公告)日:2011-08-02

    申请号:US12497688

    申请日:2009-07-05

    IPC分类号: H04N3/14 H04N5/335

    CPC分类号: H04N5/3559 H04N5/378

    摘要: A photodetecting circuit is disclosed which includes a photodetector for generating a signal in response to incident light, a storage node, transfer and reset transistors and an output circuit. The storage node has first and second node terminals. The second node terminal is connected to a compensation signal during a read period of the photodetection circuit. The transfer transistor is disposed intermediate the first node terminal of the storage node and the photodetector and is for electrically connecting the first node terminal and the photodetector during an integration period upon receiving a transfer signal to a gate of the transfer transistor, allowing charge stored in the storage node to change based on the signal of the photodetector. The reset transistor has a control node for receiving a reset signal, a first terminal for receiving a reset voltage, and a second terminal electrically connected to the first node terminal, such that the reset voltage is supplied to the first node terminal when the reset signal is asserted at a gate of the reset transistor. The output circuit generates an output signal during the read period of the photodetecting circuit. The output signal is at least partially based on a voltage at the first terminal. The compensation signal is a logically negated version of the transfer signal.

    摘要翻译: 公开了一种光电检测电路,其包括用于响应于入射光产生信号的光电检测器,存储节点,传输和复位晶体管以及输出电路。 存储节点具有第一和第二节点终端。 在光检测电路的读取期间,第二节点终端连接到补偿信号。 传输晶体管设置在存储节点的第一节点和光电检测器之间,并且在接收到传输晶体管的栅极的传输信号的积分周期期间电连接第一节点端子和光电检测器, 存储节点根据光电检测器的信号而改变。 复位晶体管具有用于接收复位信号的控制节点,用于接收复位电压的第一端子和电连接到第一节点端子的第二端子,使得当复位信号被复位时,复位电压被提供给第一节点端子 在复位晶体管的栅极处被断言。 输出电路在光电检测电路的读取期间产生输出信号。 输出信号至少部分地基于第一端子处的电压。 补偿信号是传输信号的逻辑上否定的版本。