Patents by Inventor JoAnn Close

JoAnn Close 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).

  • Circuits with floating bias
    Patent number: 9729140
    Abstract: Apparatus and methods to increase the range of a signal processing circuit. A system uses floating bias circuits coupled to a signal processing circuit to increase the range of power supplies that can be used with the signal processing circuit, while maintaining the components of the signal processing circuit within a breakdown voltage threshold. As the voltage level of the data signal varies, the voltage level of the floating bias circuits varies as well.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: August 8, 2017
    Assignee: Analog Devices, Inc.
    Inventors: JoAnn Close, Jennifer W. Pierdomenico, David Hall Whitney
  • CIRCUITS WITH FLOATING BIAS
    Publication number: 20150256170
    Abstract: Apparatus and methods to increase the range of a signal processing circuit. A system uses floating bias circuits coupled to a signal processing circuit to increase the range of power supplies that can be used with the signal processing circuit, while maintaining the components of the signal processing circuit within a breakdown voltage threshold. As the voltage level of the data signal varies, the voltage level of the floating bias circuits varies as well.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 10, 2015
    Applicant: Analog Devices, Inc.
    Inventors: JoAnn Close, John W. Pierdomenico, David Hall Whitney
  • Differentially compensated input pair
    Patent number: 8085093
    Abstract: The invention is directed to an amplifier including an absolute value circuit. The absolute value circuit may be driven by differential potentials and may include a first pair of transistors modulating a tail current of the amplifier when a differential input voltage goes high, and a second pair of transistors modulating the tail current of the amplifier when a differential input voltage goes low.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: December 27, 2011
    Assignee: Analog Devices, Inc.
    Inventors: Nathan Carter, JoAnn Close, Vikram Garg
  • DIFFERENTIALLY COMPENSATED AMPLIFIER
    Publication number: 20110128077
    Abstract: The invention is directed to an amplifier including an absolute value circuit. The absolute value circuit may be driven by differential potentials and may include a first pair of transistors modulating a tail current of the amplifier when a differential input voltage goes high, and a second pair of transistors modulating the tail current of the amplifier when a differential input voltage goes low.
    Type: Application
    Filed: December 2, 2009
    Publication date: June 2, 2011
    Applicant: ANALOG DEVICES, INC.
    Inventors: Nathan CARTER, JR., JoAnn CLOSE, Vikram GARG