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    • 68. 发明公开
    • Image sensor with active reset and randomly addressable pixels
    • Bildsensor mit aktiverRücksetzungund wahlfreien Pixeln
    • EP1507406A1
    • 2005-02-16
    • EP04005865.3
    • 2004-03-11
    • Agilent Technologies Inc. (a Delaware Corporation)
    • Fowler, Boyd, Dr.
    • H04N5/217H04N3/15H04N5/335
    • H04N5/363H04N5/23241H04N5/3745
    • An imaging array having one or more columns of pixels is disclosed. Each pixel includes a photodiode including first and second terminals, a local reset circuit for connecting the first terminal to a column reset line; and a buffer circuit for selectively connecting the first terminal to a column bit line in response to a word select signal. Each column also includes a column reset circuit having an operational amplifier and a low-pass filter. The operational amplifier has a first input connected to the column bit line for that column and a second input connected to a reset signal generator that generates a reset signal during a reset cycle. The output of the operational amplifier is connected to the column reset line during the reset cycle. In one embodiment, the gain of the operational amplifier and the passband of the low-pass filter are varied during the reset cycle.
    • 公开了具有一个或多个像素列的成像阵列。 每个像素包括包括第一和第二端子的光电二极管,用于将第一端子连接到列复位线的本地复位电路; 以及缓冲电路,用于响应于字选择信号选择性地将第一端连接到列位线。 每列还包括具有运算放大器和低通滤波器的列复位电路。 运算放大器具有连接到该列的列位线的第一输入端和连接到在复位周期期间产生复位信号的复位信号发生器的第二输入。 在复位周期中,运算放大器的输出端连接到列复位线。 在一个实施例中,运算放大器的增益和低通滤波器的通带在复位周期期间变化。