Patents by Inventor Joseph W. Tannehill

Joseph W. Tannehill 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).

  • Patent number: 6841986
    Abstract: A probe for measuring radio frequency/electromagnetic interference (RF/EMI) is used in combination with a spectrum analyzer or oscilloscope (measuring equipment) to measure and/or test for EMI in electronic equipment. The RF/EMI probe has high dielectric transformer isolation between the input of the measuring equipment and the circuit under test so as to prevent damaging the measuring equipment if a high voltage or current is encountered in the circuit being tested. The RF/EMI probe comprises a measurement tip connected to a shielded sense line, the shielded sense line is electro-magnetically coupled to a toroid forming a RF transformer, a high impedance termination load is connected to the shielded sense line, a shielded coaxial cable having a center conductor connected to a secondary winding on the toroid transformer, the shielded coaxial cable being adapted for connection to an input of the measuring equipment.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: January 11, 2005
    Assignee: Dell Products L.P.
    Inventor: Joseph W. Tannehill
  • Patent number: 6421221
    Abstract: An apparatus for redirecting electrostatic discharge currents includes a reference voltage member and an ESD susceptible system component. The ESD susceptible system component is electrically connected to the reference voltage member. An ESD receiving member is electrically connected to the reference voltage member. The ESD receiving member includes an ESD receiving portion positioned adjacent to the ESD susceptible system component. The ESD receiving member may be effectively used as a cost-effective stop gap solution in the manufacture of an electronic device adversely affected by electrostatic discharge until a long term solution is designed and implemented.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: July 16, 2002
    Assignee: Dell Products, L.P.
    Inventors: Gary S. Thomason, Joseph W. Tannehill