Patents by Inventor Edward J Whittaker

Edward J Whittaker 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).

  • Integrated implementation of a voltage boost follower and method therefor
    Patent number: 7728663
    Abstract: A collector boost circuit is disclosed for providing a first voltage in a first mode of operation to a power amplifier, and another voltage in a second mode of operation to the power amplifier. The collector boost circuit uses an indicator signal derived by an RF detector to switch between the first and the second mode of operation. The another voltage is a boosted voltage greater than the first voltage and is provided when required during peak excursions to prevent amplifier clipping through a boost capacitor. The another voltage is continuous and varies in accordance with the detected peak signal amplitude.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: June 1, 2010
    Assignee: SiGe Semiconductor Inc.
    Inventors: Gordon G. Rabjohn, Johan Grundlingh, Edward J. Whittaker
  • Gain Control for Linear Radio Freqency Power Amplifiers
    Publication number: 20100007414
    Abstract: A bias control circuit is provided comprising an input port for receiving a signal indicative of an amplitude of a supply voltage provided to a multi stage power amplifier circuit. Electronic circuitry, electrically coupled to the input port, generates a bias control signal in dependence upon the signal indicative of a supply voltage for provision to a first stage power amplifier of the multi stage power amplifier circuit. The bias control signal is generated such that a gain change of the multi stage power amplifier circuit due to a supply voltage change is substantially compensated.
    Type: Application
    Filed: July 8, 2009
    Publication date: January 14, 2010
    Applicant: SiGe Semiconductor Inc.
    Inventors: Kenneth Searle, Edward J. Whittaker
  • High speed level shift circuit for low voltage output
    Patent number: 6483345
    Abstract: An interface circuit from Common Mode Logic to a low voltage, fixed common mode output, with high current drive. The CML signal is received, and then re-referenced to a low-voltage band-gap supply. The circuit is arranged to provide an output data signal referenced to a second positive reference voltage supply responsive to receipt of a common mode input data signal referenced to a first positive reference voltage supply. The circuit avoids use of vertical PNP transistors in the signal path.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: November 19, 2002
    Assignee: Nortel Networks Limited
    Inventors: Edward J Whittaker, Imran Sherazi
  • Telephone instrument circuit
    Patent number: 4608462
    Abstract: An integrated circuit for a telephone instrument provides the basic (POT) service requirement. The transmit and receive channels of the circuit may be fed via controlled attenuators incorporated in a first ancillary circuit to provide hands-free operation. The circuit also includes a current-limited power supply whereby connection to a second ancillary circuit, including an audio amplifier, may be effected to provide loudspeaker operation.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: August 26, 1986
    Assignee: International Standard Electric Corporation
    Inventors: Peter F. Blomley, Kenneth A. Arton, Edward J. Whittaker, Andrew P. Lefevre