Patents by Inventor Stephen Jonathan Brett

Stephen Jonathan Brett 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).

  • Publication number: 20120074998
    Abstract: An integrated circuit device for compensating frequency drift of a controllable oscillator is described. The integrated circuit device includes at least one compensation module including: an input for receiving at least an indication of a frequency control signal (vci) from at least one frequency control module; and an output for providing at least one compensation signal (vct) to the controllable oscillator. The at least one compensation module is arranged to compare the at least indication of the frequency control signal (vci) with a reference voltage signal (vref); and generate the at least one compensation signal (vct) based at least partly on the comparison of the indication of the frequency control signal (vci) to the reference voltage signal (vref).
    Type: Application
    Filed: May 25, 2011
    Publication date: March 29, 2012
    Inventors: Stephen Jonathan Brett, Augusto Marques, Jonathan Richard STRANGE
  • Patent number: 7038552
    Abstract: A frequency agile voltage controlled oscillator is provided in which amplitude control is performed by digitally controlling the current supplied to the oscillator from a current source (10). The use of digital control means that phase noise performance of the oscillator is not degraded by the introduction of noise from the current source controller.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: May 2, 2006
    Assignee: Analog Devices, Inc.
    Inventors: Stephen Jonathan Brett, Jonathan Richard Strange, Paul Fowers, Christopher Geraint Jones
  • Patent number: 6400541
    Abstract: A circuit protects differential inputs of circuitry, such as RF circuitry, against electrostatic discharge. The circuit includes first and second diodes connected in opposite directions between a first differential input pin and a virtual ground node, third and fourth diodes connected in opposite directions between a second differential input pin and the virtual ground node, a first protection device connected between the virtual ground node and a first external pin, such as a positive supply pin, and a second protection device connected between the virtual ground node and a second external pin, such as a negative supply pin. The first and second protection devices may be fifth and sixth diodes, respectively. Because no signal appears at the virtual ground node, the fifth and sixth diodes can be relatively large.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: June 4, 2002
    Assignee: Analog Devices, Inc.
    Inventor: Stephen Jonathan Brett