Patents Assigned to Doxs Technology Systems, Inc.
  • Oxygen sensing
    Patent number: 6758962
    Abstract: Oxygen concentration measurement is carried out over a broad range by an instrument utilizing a zinc-air cell having a lower-than-nominal potential difference imposed across its electrodes by a shunt branch incorporating the source-drain circuit of a field effect transistor (FET). A feedback circuit is used to improve linearity of the output and cell life without sacrificing the broad dynamic range achieved by the use of the FET shunt branch.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: July 6, 2004
    Assignee: Doxs Technology Systems, Inc.
    Inventors: Matthew S. Fitzgerald, Edward C. Berdich, Peter M. Draper