Patents by Inventor Edward E. Averill

Edward E. Averill 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).

  • External clock count based auto trigger for an oscilloscope
    Patent number: 5530341
    Abstract: A trigger system for a digital oscilloscope operating in external clock mode. Every n pulses, the trigger system generates a trigger signal. The trigger system therefore provides a trigger every n samples of the input signal waveform.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: June 25, 1996
    Assignee: Tektronix, Inc.
    Inventors: Pavel R. Zivny, Edward E. Averill
  • Rasterscan display with adaptive decay
    Patent number: 5387896
    Abstract: Apparatus for manipulating numerical values stored in a memory comprises a modify device for receiving numerical values from the memory and returning numerical values to the memory. The modify device has at least a first state in which it modifies a numerical value received from the memory in a predetermined fashion before returning the numerical value to the memory and a second state in which it does not modify a numerical value received from the memory in the predetermined fashion before returning the numerical value to the memory. The apparatus also comprises a characterizing device for examining at least some of the numerical values and calculating at least one number that defines a property of the examined numerical values. The characterizing device is connected to the modify device for placing the modify device in the first state or the second state depending on the value of the calculated number.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: February 7, 1995
    Assignee: Tektronix, Inc.
    Inventors: Kuriappan P. Alappat, Edward E. Averill
  • Method of operating a buffer memory to provide a trigger pattern by storing a trigger code in preselected areas of the buffer memory
    Patent number: 5295080
    Abstract: Selected memory locations of a buffer memory having an m x n address space are loaded each with a trigger code. First and second data words, in bits and n bits respectively, are used to read the numerical value stored at a memory location of the buffer memory. If the numerical value bears a predetermined relationship to the trigger code, a predetermined response signal is generated.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: March 15, 1994
    Assignee: Tektronix, Inc.
    Inventor: Edward E. Averill