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Masafumi Nogawa

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  • Kanagawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Amplifier
    • Patent number 10,892,716
    • Issue date Jan 12, 2021
    • Nippon Telegraph and Telephone Corporation
    • Shinsuke Nakano
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Amplifier
    • Patent number 10,804,857
    • Issue date Oct 13, 2020
    • Nippon Telegraph and Telephone Corporation
    • Masafumi Nogawa
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Driver circuit and optical transmitter
    • Patent number 10,666,212
    • Issue date May 26, 2020
    • Nippon Telegraph and Telephone Corporation
    • Shinsuke Nakano
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Directly modulated laser drive circuit
    • Patent number 10,637,207
    • Issue date Apr 28, 2020
    • Nippon Telegraph and Telephone Corporation
    • Toshiki Kishi
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Optical modulator driver circuit and optical transmitter
    • Patent number 10,243,664
    • Issue date Mar 26, 2019
    • Nippon Telegraph and Telephone Corporation
    • Munehiko Nagatani
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Transimpedance amplifier circuit
    • Patent number 9,853,618
    • Issue date Dec 26, 2017
    • Nippon Telegraph and Telephone Corporation
    • Hiroshi Koizumi
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Optical signal detection circuit and optical receiver
    • Patent number 9,160,458
    • Issue date Oct 13, 2015
    • Nippon Telephone and Telegraph Corporation
    • Hiroshi Koizumi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Optical signal cutoff detection circuit and optical receiver
    • Patent number 9,025,970
    • Issue date May 5, 2015
    • Nippon Telegraph and Telephone Corporation
    • Hiroshi Koizumi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Phase comparison circuit and CDR circuit
    • Patent number 7,368,954
    • Issue date May 6, 2008
    • Nippon Telegraph and Telephone Corporation
    • Yusuke Otomo
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    AMPLIFIER
    • Publication number 20200036344
    • Publication date Jan 30, 2020
    • Nippon Telegraph and Telephone Corporation
    • Shinsuke Nakano
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    AMPLIFIER
    • Publication number 20190393841
    • Publication date Dec 26, 2019
    • Nippon Telegraph and Telephone Corporation
    • Masafumi Nogawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    DIRECTLY MODULATED LASER DRIVE CIRCUIT
    • Publication number 20190245624
    • Publication date Aug 8, 2019
    • Nippon Telegraph and Telephone Corporation
    • Toshiki KISHI
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    DRIVER CIRCUIT AND OPTICAL TRANSMITTER
    • Publication number 20190068147
    • Publication date Feb 28, 2019
    • Nippon Telegraph and Telephone Corporation
    • Shinsuke NAKANO
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Application

    Transimpedance Amplifier Circuit
    • Publication number 20160261246
    • Publication date Sep 8, 2016
    • Nippon Telegraph and Telephone Corporation
    • Hiroshi KOIZUMI
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Optical Modulator Driver Circuit and Optical Transmitter
    • Publication number 20160087727
    • Publication date Mar 24, 2016
    • Nippon Telegraph and Telephone Corporation
    • Munehiko Nagatani
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    OPTICAL SIGNAL DETECTION CIRCUIT AND OPTICAL RECEIVER
    • Publication number 20140016949
    • Publication date Jan 16, 2014
    • Nippon Telegraph and Telephone Corporation
    • Hiroshi Koizumi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    OPTICAL SIGNAL CUTOFF DETECTION CIRCUIT AND OPTICAL RECEIVER
    • Publication number 20130039649
    • Publication date Feb 14, 2013
    • Hiroshi Koizumi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Phase comparison circuit and cdr circuit
    • Publication number 20060050828
    • Publication date Mar 9, 2006
    • Nippon Telegraph and Telephone Corporation
    • Yusuke Otomo
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE