Patents by Inventor Geoffrey G. Windus

Geoffrey G. Windus 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).

  • Phase modulator circuit
    Patent number: 4932038
    Abstract: A phase modulator circuit includes a pair of similar long-tailed pair transistor amplifiers (TR11, TR12 and TR13, TR14) to which sinusoidal signals are fed. The transistor pairs form the collection loads of a further long tailed pair (TR21, TR22) fed with a modulator signal. The circuit generates an output of constant amplitude but modulated in phase in correspondence with the modulated signal. The circuit may be used in the supervisory unit of a telecommunication repeater.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: June 5, 1990
    Assignee: STC PLC
    Inventor: Geoffrey G. Windus