Patents by Inventor Purcel Matthew

Purcel Matthew 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).

  • CMOS image sensors
    Patent number: 6818933
    Abstract: An active pixel array has the signal output of each pixel connected to a first column conductor, and a reset switch connected to a second column conductor. The first and second column conductors are connected to a read-reset amplifier. The read-reset amplifier operates in a first mode in which a reset voltage is applied to the second column line, and in a second mode in which pixel output signals are buffered from the first column line. The read-reset amplifier can also operate as a comparator forming part of an ADC circuit.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: November 16, 2004
    Assignee: STMicroelectronics Ltd.
    Inventors: Robert Henderson, Purcel Matthew, Jonathan Ephriam David Hurwitz
  • CMOS image sensors
    Publication number: 20030080340
    Abstract: An active pixel array has the signal output of each pixel connected to a first column conductor, and a reset switch connected to a second column conductor. The first and second column conductors are connected to a read-reset amplifier. The read-reset amplifier operates in a first mode in which a reset voltage is applied to the second column line, and in a second mode in which pixel output signals are buffered from the first column line. The read-reset amplifier can also operate as a comparator forming part of an ADC circuit.
    Type: Application
    Filed: October 4, 2002
    Publication date: May 1, 2003
    Applicant: STMicroelectronics Ltd.
    Inventors: Robert Henderson, Purcel Matthew, Jonathan Ephriam David Hurwitz