Patents by Inventor Lee D. Cosart, III

Lee D. Cosart, III 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: 5008610
    Abstract: Method and apparatus for determining a generalized harmonic number in a harominic heterodyne converter wherein the frequency of an input signal is determined from a local oscillator frequency, an intermediate frequency obtained by mixing the local oscillator frequency with the input signal, and a harmonic number. The likelihood of error in determining harmonic number is reduced by providing a large separation between local oscillator frequencies that are used in determining harmonic number. The method involves the steps of determining an estimated harmonic number utilizing closely-spaced local oscillator frequencies and then utilizing the estimated harmonic number to compute widely-spaced local oscillator frequencies which are utilized for determining a corrected generalized harmonic number. One variation of the technique is utilized for high harmonic numbers, and another variation of the technique is utilized for low harmonic numbers.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: April 16, 1991
    Assignee: Hewlett-Packard Company
    Inventors: Nancy W. Nelson, Lee D. Cosart, III, Luiz Peregrino, Eric M. Ingman
  • Patent number: 4996474
    Abstract: A method of digitally controlling the gate for a timing counter, to open and close the gate based on the occurrence of signal events, rather than on the envelope of the pulse. In a particular embodiment, a digital divider controls the gate, so that, when a pulse burst of RF is encountered, the gate opens on the second signal event. The divider can be programmed to close the gate any number of signal events later. Measurements are taken for an integral number of signal events, while counting time events from a precision clock. A series of measurements can be taken with various integral numbers of signal events for frequency profiling. By incrementing the digital divider from n to n+1 signal events for successive measurements, and subtracting the results, very narrow gates are effectively generated which move through the pulse cycle by cycle for frequency profiling.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: February 26, 1991
    Assignee: Hewlett-Packard Company
    Inventors: Atul Tambe, David Chu, Lee D. Cosart, III