Patents by Inventor Yoshihiko Nakahira

Yoshihiko Nakahira 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: 8471794
    Abstract: To obtain an amplifier circuit capable of realizing low power consumption and high-precision output. A controlling unit controls each switch of an offset correction circuit to select one capacitor associated with a voltage level of an input signal selected by an input signal selection unit, have an offset voltage of an operational amplifier generated according to the voltage level of the input signal stored by the selected capacitor, and correct an output of the operational amplifier by using the offset voltage held by the selected capacitor.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: June 25, 2013
    Assignee: Getner Foundation LLC
    Inventors: Yoshihiko Nakahira, Hiroshi Tsuchi
  • Publication number: 20090278868
    Abstract: To obtain an amplifier circuit capable of realizing low power consumption and high-precision output. A controlling unit controls each switch of an offset correction circuit to select one capacitor associated with a voltage level of an input signal selected by an input signal selection unit, have an offset voltage of an operational amplifier generated according to the voltage level of the input signal stored by the selected capacitor, and correct an output of the operational amplifier by using the offset voltage held by the selected capacitor.
    Type: Application
    Filed: July 17, 2009
    Publication date: November 12, 2009
    Applicant: NEC CORPORATION
    Inventors: Yoshihiko NAKAHIRA, Hiroshi TSUCHI
  • Patent number: 7586504
    Abstract: To obtain an amplifier circuit capable of realizing low power consumption and high-precision output. A controlling unit controls each switch of an offset correction circuit to select one capacitor associated with a voltage level of an input signal selected by an input signal selection unit, have an offset voltage of an operational amplifier generated according to the voltage level of the input signal stored by the selected capacitor, and correct an output of the operational amplifier by using the offset voltage held by the selected capacitor.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: September 8, 2009
    Assignee: NEC Corporation
    Inventors: Yoshihiko Nakahira, Hiroshi Tsuchi
  • Patent number: 7116161
    Abstract: Even when an input is small in a current supply capacity, a differential amplifier circuit capable of outputting a high accurate voltage with an offset corrected can be obtained.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: October 3, 2006
    Assignees: NEC Corporation, NEC Electronics Corporation
    Inventor: Yoshihiko Nakahira
  • Publication number: 20060098032
    Abstract: To obtain an amplifier circuit capable of realizing low power consumption and high-precision output. A controlling unit controls each switch of an offset correction circuit to select one capacitor associated with a voltage level of an input signal selected by an input signal selection unit, have an offset voltage of an operational amplifier generated according to the voltage level of the input signal stored by the selected capacitor, and correct an output of the operational amplifier by using the offset voltage held by the selected capacitor.
    Type: Application
    Filed: December 6, 2005
    Publication date: May 11, 2006
    Applicant: NEC CORPORATION
    Inventors: Yoshihiko Nakahira, Hiroshi Tsuchi
  • Patent number: 7005916
    Abstract: To obtain an amplifier circuit capable of realizing low power consumption and high-precision output. A controlling unit controls each switch of an offset correction circuit to select one capacitor associated with a voltage level of an input signal selected by an input signal selection unit, have an offset voltage of an operational amplifier generated according to the voltage level of the input signal stored by the selected capacitor, and correct an output of the operational amplifier by using the offset voltage held by the selected capacitor.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: February 28, 2006
    Assignee: NEC Corporation
    Inventors: Yoshihiko Nakahira, Hiroshi Tsuchi
  • Publication number: 20050073358
    Abstract: Even when an input is small in a current supply capacity, a differential amplifier circuit capable of outputting a high accurate voltage with an offset corrected can be obtained.
    Type: Application
    Filed: September 14, 2004
    Publication date: April 7, 2005
    Inventor: Yoshihiko Nakahira
  • Publication number: 20030146923
    Abstract: To obtain an amplifier circuit capable of realizing low power consumption and high-precision output. A controlling unit controls each switch of an offset correction circuit to select one capacitor associated with a voltage level of an input signal selected by an input signal selection unit, have an offset voltage of an operational amplifier generated according to the voltage level of the input signal stored by the selected capacitor, and correct an output of the operational amplifier by using the offset voltage held by the selected capacitor.
    Type: Application
    Filed: February 5, 2003
    Publication date: August 7, 2003
    Applicant: NEC CORPORATION
    Inventors: Yoshihiko Nakahira, Hiroshi Tsuchi