Patents by Inventor Kunihiko Hamaguchi

Kunihiko Hamaguchi 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).

  • Differential amplifier with input signal determined standby state
    Patent number: 6028458
    Abstract: An input first stage circuit performing switching between activation and inactivation in response to an input signal includes a differential amplifier for comparing the input signal with a reference voltage and a switching transistor for receiving a power supply disconnection signal to control the power supplied, and a level detection circuit including a low level standby detector for detecting a low level of the input signal and a high level standby detector for detecting a high level of the input signal.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: February 22, 2000
    Assignee: NEC Corporation
    Inventor: Kunihiko Hamaguchi
  • Serial access memory circuit with improved serial addressing circuit composed of a shift register
    Patent number: 4903242
    Abstract: A serial access memory circuit provided with an improved serial addressing circuit which can be fabricated with a reduced number of elements, is disclosed. The memory circuit comprises a memory array of N columns to be serially accessed, and a serial selection circuit including a shift register of N/K stages, a control circuit generating K output signals and a gate circuit receiving output signals of N/K stages of the shift register and K output signals of the control circuit and generating N output signals.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: February 20, 1990
    Assignee: NEC Corporation
    Inventors: Kunihiko Hamaguchi, Yasuhide Ohara