Patents by Inventor Morley M. Merriss

Morley M. Merriss 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).

  • Thermo-electric cooled oven controlled crystal oscillator
    Patent number: 6166608
    Abstract: The present invention is a stabilized oscillator system comprising an oven controlled crystal oscillator positioned inside an insulated housing. Within the insulated housing, there is a cold plate in thermal contact with the oven controlled crystal oscillator and a thermo-electric cooler in contact with the cold plate. A heat sink external to the insulated housing is in thermal contact with the thermo-electric cooler. The thermo-electric cooler pumps heat into or out of the oven controlled crystal oscillator through the cold plate and into or out of the heat sink. The thermo-electric cooler is controlled as part of a feedback loop which attempts to stabilize the output frequency of the oven controlled crystal oscillator.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: December 26, 2000
    Assignee: Symmetricom, Inc.
    Inventors: Morley M. Merriss, George P. Zampetti
  • Digital phase detector employing a digitally controllable delay line
    Patent number: 5646519
    Abstract: A digital phase detector composed of: a digitally controllable signal delay device having a signal input, a signal output and a control input, the delay device being operative for conducting a signal from the signal input to the signal output with a time delay having a duration determined by a control signal supplied to the control input, the signal input being connected to receive either an input signal or a digital local clock signal; a phase relation detector connected to receive a first input signal from the signal output of the signal delay device and a second input signal constituted by the one of the input signal and the digital local clock signal which is not received by the signal input of the signal delay device, for periodically comparing the phases of the first and second input signals and for producing a binary output signal composed of a succession of signal segments, each segment having a first value when the first input signal is leading the second input signal in phase and a second value when
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 8, 1997
    Assignee: Symmetricom, Inc.
    Inventors: Michael M. Hamilton, Morley M. Merriss, George P. Zampetti
  • Transmultiplexer virtual group distribution frame
    Patent number: 4813035
    Abstract: A transmultiplexer for use in a telephone system is disclosed. The transmultiplexer includes a programmable virtual distribution frame feature which provides for information traffic to be switched from one digital group facility to another analog facility in both time division multiplexed and frequency division multiplexed directions.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: March 14, 1989
    Assignee: Granger Associates
    Inventors: H. John Bishop, Morley M. Merriss, Thomas L. Ohlsson, Terrence G. Sopira