Patents by Inventor Robert J. Emslie

Robert J. Emslie 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).

  • Automatic gain control system
    Patent number: 5134722
    Abstract: An automatic gain control system handles inphase and quadrature phase signals, and is for use in digital cellular radio receiver equipment. The system comprises an inphase signal path and a quadrature phase signal path, each path including a logarithmic attenuator, the inphase and quadrature phase signal paths each including a feedforward path including a logarithmic detector. The output of the detectors are compared by respective comparators with an analogue signal, and output signals from the comparators are arranged to control a counter arrangement which generates a data word which is used to control the performance of the logarithmic attenuators.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: July 28, 1992
    Inventors: Robert J. Emslie, Robert O. Bristow, Christopher N. Smith
  • Amplifier arrangement with time constant control
    Patent number: 5130668
    Abstract: An amplifier arrangement suitable for use in a receiver for use in a telecommunications system is described. The arrangement includes an amplifier and an FET switch arrangement arranged to alter the time constant of the amplifier in dependence upon the incident signal frequency. A balance switch arrangement is arranged such that switching transients of the switch arrangement are cancelled out in the amplifier arrangement.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: July 14, 1992
    Assignees: Orbitel Mobile Communications Limited, The Plessey Company Limited
    Inventors: Robert J. Emslie, Christopher N. Smith