Patents by Inventor Merle L. Keller, Jr.

Merle L. Keller, Jr. 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).

  • Chip timing synchronization for link that transitions between clear and spread modes
    Patent number: 8446931
    Abstract: Synchronization of a primary link which transitions between clear mode and spread mode is achieved and maintained using a secondary link. When transitioning from clear mode to spread mode, a primary transmission delta phase is adjusted by the difference between a secondary reception delta phase and the primary transmission delta phase; and a primary reception delta phase is adjusted to be equal to a secondary transmission delta phase.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: May 21, 2013
    Assignee: L-3 Communications Corp
    Inventors: Merle L. Keller, Jr., Vaughn L. Mower, Steve J. McEntire, Kent R. Bruening
  • Long phase-locked carrier recovery loop
    Patent number: 4749960
    Abstract: A long phase-locked loop circuit is provided which has an electronic closure circuit in series in the loop. The loop is effectively an open loop until acquisition of the incoming signal at which time the electronic closure circuit closes the phase-locked loop. A novel coincidence circuit is provided which compares the carrier in the loop with a reference frequency and when the two frequencies are equal the coincidence circuit closes the electronic closure circuit.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: June 7, 1988
    Assignee: Unisys Corporation
    Inventors: Vaughn L. Mower, Merle L. Keller, Jr.