Patents by Inventor John P. Doty

John P. Doty 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).

  • Event-driven charge-coupled device design and applications therefor
    Patent number: 6917041
    Abstract: An event-driven X-ray CCD imager device uses a floating-gate amplifier or other non-destructive readout device to non-destructively sense a charge level in a charge packet associated with a pixel. The output of the floating-gate amplifier is used to identify each pixel that has a charge level above a predetermined threshold. If the charge level is above a predetermined threshold the charge in the triggering charge packet and in the charge packets from neighboring pixels need to be measured accurately. A charge delay register is included in the event-driven X-ray CCD imager device to enable recovery of the charge packets from neighboring pixels for accurate measurement. When a charge packet reaches the end of the charge delay register, control logic either dumps the charge packet, or steers the charge packet to a charge FIFO to preserve it if the charge packet is determined to be a packet that needs accurate measurement.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: July 12, 2005
    Assignee: Massachusetts Institute of Technology
    Inventors: John P. Doty, George R. Ricker, Jr., Barry E. Burke, Gregory Y. Prigozhin
  • Event-driven charge-coupled device design and applications therefor
    Publication number: 20040026623
    Abstract: An event-driven X-ray CCD imager device uses a floating-gate amplifier or other non-destructive readout device to non-destructively sense a charge level in a charge packet associated with a pixel. The output of the floating-gate amplifier is used to identify each pixel that has a charge level above a predetermined threshold. If the charge level is above a predetermined threshold the charge in the triggering charge packet and in the charge packets from neighboring pixels need to be measured accurately. A charge delay register is included in the event-driven X-ray CCD imager device to enable recovery of the charge packets from neighboring pixels for accurate measurement. When a charge packet reaches the end of the charge delay register, control logic either dumps the charge packet, or steers the charge packet to a charge FIFO to preserve it if the charge packet is determined to be a packet that needs accurate measurement.
    Type: Application
    Filed: March 18, 2003
    Publication date: February 12, 2004
    Inventors: John P. Doty, George R. Ricker, Barry E. Burke, Gregory Y. Prigozhin