Patents by Inventor Cathal MURPHY

Cathal MURPHY 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).

  • Patent number: 8824626
    Abstract: A detector circuit can include an integrator having an amplifier, a first feedback capacitor connected between an input and output of the amplifier, one or more additional feedback capacitors connected by at least one switch between the input and output of the amplifier, and a shunt capacitor connected to the output of the amplifier. The shunt capacitor can be selected to have a capacitance value greater than that of a minimum but less than that of a maximum feedback capacitance. The detector circuit can further include a sampling circuit having a sampling capacitor connected to the output of the integrator amplifier through at least one switch, wherein the sampling capacitor is separate from the shunt capacitor. A computed tomography imaging apparatus can include the detector circuit.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: September 2, 2014
    Assignee: Analog Devices, Inc.
    Inventors: Michael Coln, Paraic Brannick, Colin G. Lyden, Cathal Murphy
  • Publication number: 20130329853
    Abstract: A detector circuit can include an integrator having an amplifier, a first feedback capacitor connected between an input and output of the amplifier, one or more additional feedback capacitors connected by at least one switch between the input and output of the amplifier, and a shunt capacitor connected to the output of the amplifier. The shunt capacitor can be selected to have a capacitance value greater than that of a minimum but less than that of a maximum feedback capacitance. The detector circuit can further include a sampling circuit having a sampling capacitor connected to the output of the integrator amplifier through at least one switch, wherein the sampling capacitor is separate from the shunt capacitor. A computed tomography imaging apparatus can include the detector circuit.
    Type: Application
    Filed: June 11, 2012
    Publication date: December 12, 2013
    Applicant: ANALOG DEVICES, INC.
    Inventors: Michael COLN, Paraic BRANNICK, Colin G. LYDEN, Cathal MURPHY
  • Patent number: 8514014
    Abstract: An amplifier system can include a feedback amplifier circuit having an amplifier, a feedback capacitor connected between an input terminal and an output terminal of the amplifier by at least one first switch, and a reset capacitor connected across the feedback capacitor by at least one second switch and between a pair of reference voltages by at least one third switch. During an input-signal processing phase of operation, a control circuit may close the at least one first switch and open the at least one second switch to electrically connect the feedback capacitor between the input and output terminals to engage feedback processing by the feedback amplifier circuit, and close the third switch to electrically connect the reset capacitor between the first and second voltages to charge the reset capacitor to a selectable voltage difference.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: August 20, 2013
    Assignee: Analog Devices, Inc.
    Inventors: Cathal Murphy, Michael Coln, Gary Carreau, Alain Valentin Guery, Bruce Amazeen
  • Publication number: 20120200350
    Abstract: An amplifier system can include a feedback amplifier circuit having an amplifier, a feedback capacitor connected between an input terminal and an output terminal of the amplifier by at least one first switch, and a reset capacitor connected across the feedback capacitor by at least one second switch and between a pair of reference voltages by at least one third switch. During an input-signal processing phase of operation, a control circuit may close the at least one first switch and open the at least one second switch to electrically connect the feedback capacitor between the input and output terminals to engage feedback processing by the feedback amplifier circuit, and close the third switch to electrically connect the reset capacitor between the first and second voltages to charge the reset capacitor to a selectable voltage difference.
    Type: Application
    Filed: February 9, 2011
    Publication date: August 9, 2012
    Applicant: ANALOG DEVICES, INC.
    Inventors: Cathal MURPHY, Michael COLN, Gary CARREAU, Alain Valentin GUERY, Bruce AMAZEEN