Patents by Inventor Robert Howard Carlson

Robert Howard Carlson 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: 6970009
    Abstract: A signal translator circuit, for use in sending test signals to an IC-chip in a chip testing system, includes first and second resistors, and a single transistor. The transistor has a current channel which is coupled in series with the first resistor between a source voltage terminal and an output terminal. The single transistor also has a control lead, for enabling and disabling the flow of current through the current channel, which receives an input test signal at voltage levels that are to be translated. The output terminal is coupled through the second resistor to a reference voltage terminal. The output terminal is also coupled to an input terminal of a socket which is structured to hold the IC-chip.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: November 29, 2005
    Assignee: Unisys Corporation
    Inventors: Carl Larry Ostrowski, Robert Howard Carlson
  • Patent number: 6958617
    Abstract: An electromechanical module, for holding IC-chips in a chip testing system, includes a circuit board having a plurality of sockets mounted thereon. Each socket is structured to hold one IC-chip that is to be tested, and each socket has a corresponding register on the circuit board. In addition, a bus is on the circuit board, which—a) sends a timing pulse to a clock input on all of the registers in parallel, and b) concurrently sends a clock signal and N?1 test signals to N data inputs on all of the registers. Further, each socket has N input terminals that are connected to N outputs on a respective set of signal translators on the circuit board, and each set of signal translators has N inputs that are connected to N data outputs on the socket's corresponding register.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: October 25, 2005
    Assignee: Unisys Corporation
    Inventors: James Vernon Rhodes, Robert Howard Carlson, Terry Sinclair Connacher, Carl Larry Ostrowski