Patents by Inventor Basil B. Foster

Basil B. Foster 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).

  • Timing extraction circuit
    Patent number: 4736120
    Abstract: A regenerator for an undersea optical transmission system has a timing extraction circuit for extracting the clock signal from an NRZ PCM signal. The circuit comprises a surface acoustic wave filter (F) which feeds an amplifier which comprises a number of similar cascaded amplifier sections provided by an integrated circuit. The first stage is a grounded base stage (stage 1) and the following sections each include a balanced emitter-follower buffer stage (stage 2) and a balanced long-tailed pair stage (stage 3). Any base and emitter voltages in an amplifier section are minimised if not eliminated by the long-tailed pair having equal emitter and collector loads.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: April 5, 1988
    Assignee: STC Plc
    Inventor: Basil B. Foster
  • Clock extraction circuit for a PCM signal
    Patent number: 4531222
    Abstract: A clock extraction circuit for PCM NRZ signals which delivers substantially constant power and comprising at least one energy storage device charged by a constant current and discharged into a full wave amplifying circuit, the amplifying circuit delivering power to a filter which filters out the clock signal. This arrangement uses a passive tank circuit and ensures the clock signal from the NRZ data does not die out during periods of little or no clock content in the data stream.
    Type: Grant
    Filed: July 15, 1983
    Date of Patent: July 23, 1985
    Assignee: International Standard Electric Corporation
    Inventor: Basil B. Foster
  • Transmission systems
    Patent number: 4136267
    Abstract: A repeater for a submarine cable installation which allows remote control of amplifier gain, equalizer losses and oscillator frequency. A control signal of selected frequency is transmitted to the repeater and converted to a d.c. control signal to adjust the selected component. The signal from the remote control may be in the form of pulses of a desired frequency or signals of longer duration.
    Type: Grant
    Filed: April 1, 1977
    Date of Patent: January 23, 1979
    Assignee: International Standard Electric Corporation
    Inventors: Basil B. Foster, Ian J. Hirst
  • Surge protection device for repeater
    Patent number: 4110570
    Abstract: A repeater suitable for use in submerged signal transmission systems, the repeater having inherent protection against power surges. The repeater includes a signal path including an amplifier and a separate path for powering the amplifier. The power path includes a zener diode and gas discharge tubes. One or more tubes are connected to conduct on a power surge to reverse bias the zener diode and effectively switch the diode off to protect the circuit during the incidence of the power surge.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: August 29, 1978
    Assignee: International Standard Electric Corporation
    Inventor: Basil B. Foster