Patents by Inventor Roland J. Turner

Roland J. Turner 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).

  • Signal level detector with automatic switching between extended linear and square law dynamic ranges
    Patent number: 4490681
    Abstract: A signal level detector including a diode envelope detector has a characteristic having both square-law and linear-law ranges separated by an intermediate transition range of variable-law operation. The detector is provided with circuits (38, 47, 48) to extend the linear-law range of the characteristic to overlap at least a part of the variable-law transition range. A circuit (66) is provided to detect operation through an input signal level transition point between said square-law range and the extended linear-law range for automatically modifying (39) the level detector circuit so that the voltage output thereof is continuously indicative of input power level through all of said ranges.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: December 25, 1984
    Assignee: AT&T Bell Laboratories
    Inventor: Roland J. Turner
  • Digital clock phase recovery circuits for data receiver
    Patent number: 4229823
    Abstract: To stabilize the phase of bit rate clock signals recovered from a self-clocking data signal, e.g., a Manchester coded signal, extra signal level transition pulses (58) occurring during intervals of successive bits of the same info bit type are inverted (59) to reinforce the desired phase of the bit-rate frequency component.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: October 21, 1980
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: David J. Thomson, Roland J. Turner