Patents by Inventor Qingwei Shan

Qingwei Shan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Column readout circuit with increased signal range for CMOS image sensor
    Publication number: 20030183891
    Abstract: A column readout circuit for a CMOS image sensor is disclosed. The circuit uses MOS capacitors to store a photo signal and a reset signal. Correlated double sampling is used to eliminate fixed pattern noise and 1/f noise. Additionally, the signals are coupled through the capacitors using AC coupling. In this manner, a readout circuit compatible with conventional CMOS logic processes can be manufactured.
    Type: Application
    Filed: March 27, 2002
    Publication date: October 2, 2003
    Inventors: Xinping He, Hongli Yang, Qingwei Shan