Patents by Inventor Mark J. Marsan

Mark J. Marsan 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: 5103465
    Abstract: An improved symbol synchronization circuit is provided for generting a clock signal in a receiver having an input signal comprising a stream of symbols at a symbol rate of f.sub.symbol. According to the invention, a correlator is provided that operates on a multiplicity (k) of multi-phase signals, .phi..sub.1 -.phi..sub.k, each signal more or less synchronized with the stream of symbols and each having a frequency f.sub.clock generally equal to a multiple of f.sub.symbol. Based on the current synchronization of each signal .phi..sub.1 -.phi..sub.k with the stream of symbols, and also based on the past history of the synchronization of each signal with the stream of symbols, one member from the group of signals .phi..sub.1 -.phi..sub.k is periodically selected as the clock signal. This selected clock signal is then delayed to compensate for the drift between f.sub.symbol and f.sub.clock.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: April 7, 1992
    Assignee: Motorola, Inc.
    Inventors: Kenneth J. Crisler, Mark J. Marsan