Patents by Inventor Robert LIBERT

Robert LIBERT 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).

  • Input common mode voltage compensation circuit
    Patent number: 8410847
    Abstract: A voltage level shifter for a direct coupling of an external voltage source to a common mode of a circuit may include an amplifier, a voltage-controlled current source, a first and second resistors. A first input of the amplifier may be connected to the common mode. A second input of the amplifier may, via the first and second resistors, receive a voltage indicative of the external voltage source. The output of the amplifier may indicate a voltage difference between the first and second inputs. The voltage-controlled current source may be controlled by the voltage difference to supply a current to a common node of the first and second resistors so that the voltage difference between the first and second inputs may be minimized.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: April 2, 2013
    Assignee: Analog Devices, Inc.
    Inventors: Robert Libert, Khiem Quang Nguyen
  • INPUT COMMON MODE VOLTAGE COMPENSATION CIRCUIT
    Publication number: 20120286859
    Abstract: A voltage level shifter for a direct coupling of an external voltage source to a common mode of a circuit may include an amplifier, a voltage-controlled current source, a first and second resistors. A first input of the amplifier may be connected to the common mode. A second input of the amplifier may, via the first and second resistors, receive a voltage indicative of the external voltage source. The output of the amplifier may indicate a voltage difference between the first and second inputs. The voltage-controlled current source may be controlled by the voltage difference to supply a current to a common node of the first and second resistors so that the voltage difference between the first and second inputs may be minimized.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 15, 2012
    Applicant: ANALOG DEVICES, INC.
    Inventors: Robert LIBERT, Khiem Quang NGUYEN