Invention Grant
US06720592B1 Apparatus for high sensitivity, low lag, high voltage swing in a pixel cell with an electronic shutter 有权
用于具有电子快门的像素单元中的高灵敏度,低滞后,高电压摆幅的装置

  • Patent Title: Apparatus for high sensitivity, low lag, high voltage swing in a pixel cell with an electronic shutter
  • Patent Title (中): 用于具有电子快门的像素单元中的高灵敏度,低滞后,高电压摆幅的装置
  • Application No.: US09895803
    Application Date: 2001-06-29
  • Publication No.: US06720592B1
    Publication Date: 2004-04-13
  • Inventor: Willem Johannes KindtPhilipp Lindorfer
  • Applicant: Willem Johannes KindtPhilipp Lindorfer
  • Main IPC: H01L27148
  • IPC: H01L27148
Apparatus for high sensitivity, low lag, high voltage swing in a pixel cell with an electronic shutter
Abstract:
The present invention is directed to a photogate based pixel cell with an electronic shutter and which provides relatively low lag and high sensitivity for sensing infrared light reflected from objects. Additionally, this invention eliminates the need for a transfer gate in the pixel cell. In one embodiment, the reset and shutter transistors are implemented with PMOS transistors so that the pixel cell can have an increased dynamic range and a relatively high voltage swing. In another embodiment, the actual size of each pixel cell can be further reduced when the reset gate and the electronic shutter are implemented with NMOS transistors. Also, when a P− well is not disposed beneath the photogate, the ability of the pixel cell to sense infrared light is improved. Correlated double sampling can be used to improve the accuracy of the signal read out from the pixel cell.
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