Patents by Inventor Christopher David Townsend

Christopher David Townsend 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).

  • Sensor circuits
    Patent number: 8232813
    Abstract: A circuit for operating an amperometric sensor having a reference electrode, a counter electrode and a work electrode. The circuit comprises an amplifier having a positive input and a negative input and an output. The positive input is coupled to a reference voltage source, and the negative input and the output are coupled together via a negative feedback loop. The circuit includes means for coupling the amperometric sensor into said negative feedback loop of the amplifier wherein, in a first configuration, the counter electrode is coupled to said output and the reference electrode is coupled to said negative input and, in a second configuration, the work electrode is coupled to said output and the reference electrode is coupled to said negative input.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: July 31, 2012
    Assignee: Toumaz Technology Limited
    Inventors: Alison Burdett, Paul Padden, David Townsend, Sharon Louise Thornton, legal representative, Christopher David Townsend, legal representative, Richard Andrew Martin, legal representative
  • SENSOR CIRCUITS
    Publication number: 20090201032
    Abstract: A circuit for operating an amperometric sensor having a reference electrode, a counter electrode and a work electrode. The circuit comprises an amplifier having a positive input and a negative input and an output. The positive input is coupled to a reference voltage source, and the negative input and the output are coupled together via a negative feedback loop. The circuit includes means for coupling the amperometric sensor into said negative feedback loop of the amplifier wherein, in a first configuration, the counter electrode is coupled to said output and the reference electrode is coupled to said negative input and, in a second configuration, the work electrode is coupled to said output and the reference electrode is coupled to said negative input.
    Type: Application
    Filed: October 3, 2006
    Publication date: August 13, 2009
    Inventors: Alison Burdett, Paul Padden, David Townsend, Sharon Louise Thornfon, Christopher David Townsend, Richard Andrew Martin