Patents by Inventor Sumitaka OTAKE

Sumitaka OTAKE 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: 9673761
    Abstract: In dividing units, signals propagating between input ports- and output ports and between input ports and output ports have phases shifted by 90° from phases of signals propagating between the input ports and the output port and between the input ports and the output ports. Amplifiers output amplified signals that are in phase to the dividing units. A combining and dividing unit outputs a combined signal obtained by combining signals from the output ports of the dividing units to an input port of a combining unit. A combining and dividing unit outputs a combined signal obtained by combining signals from the output ports of the dividing units to an input port of a combining unit.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: June 6, 2017
    Assignee: NEC CORPORATION
    Inventor: Sumitaka Otake
  • Patent number: 9673760
    Abstract: A power amplification device (1) according to an exemplary embodiment of the invention includes a Doherty amplifier (10) that is adjusted to operate at a set frequency, a frequency comparator (11) that compares a supplied frequency being a frequency of an input signal RF_IN to the Doherty amplifier (10) with the set frequency, and a protection circuit (12) that sets an operating state of the Doherty amplifier (10) to inactive when the supplied frequency and the set frequency are different. It is thereby possible to protect the Doherty amplifier (10) when the input signal RF_IN with a frequency different from the set frequency is supplied.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: June 6, 2017
    Assignee: NEC CORPORATION
    Inventor: Sumitaka Otake
  • Publication number: 20160248383
    Abstract: In dividing units, signals propagating between input ports-and output ports and between input ports and output ports have phases shifted by 90° from phases of signals propagating between the input ports and the output port and between the input ports and the output ports. Amplifiers output amplified signals that are in phase to the dividing units. A combining and dividing unit outputs a combined signal obtained by combining signals from the output ports of the dividing units to an input port of a combining unit. A combining and dividing unit outputs a combined signal obtained by combining signals from the output ports of the dividing units to an input port of a combining unit.
    Type: Application
    Filed: November 14, 2013
    Publication date: August 25, 2016
    Applicant: NEC Corporation
    Inventor: SUMITAKA OTAKE
  • Publication number: 20160211805
    Abstract: A power amplification device (1) according to an exemplary embodiment of the invention includes a Doherty amplifier (10) that is adjusted to operate at a set frequency, a frequency comparator (11) that compares a supplied frequency being a frequency of an input signal RF_IN to the Doherty amplifier (10) with the set frequency, and a protection circuit (12) that sets an operating state of the Doherty amplifier (10) to inactive when the supplied frequency and the set frequency are different. It is thereby possible to protect the Doherty amplifier (10) when the input signal RF_IN with a frequency different from the set frequency is supplied.
    Type: Application
    Filed: September 9, 2013
    Publication date: July 21, 2016
    Inventor: Sumitaka OTAKE