Patents by Inventor Keizo Takechi

Keizo Takechi 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).

  • Driver circuit integrated with load current output circuit, pin electronics and IC tester having thereof
    Patent number: 6801050
    Abstract: A driver circuit integrated with a load current output circuit has a function as a driver for applying a predetermined test waveform to a device under test (DUT), and a function as a load current output for reproducing an actual use situation by receiving the load current to the DUT to judge a response waveform by receiving the response waveform from the DUT. Both functions are made up on a common circuit, operate as the driver circuit when applying the test waveform, and operate as the load current output circuit when judging the response waveform.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: October 5, 2004
    Assignees: Hitachi, Ltd., Hitachi Hi-Tech Electronics Engineering Co., Ltd.
    Inventors: Keizo Takechi, Akio Ohsaki, Yoshihiko Hayashi, Kazuhiko Murata
  • Driver circuit integrated with load current output circuit, pin electronics and IC tester having thereof
    Publication number: 20020171446
    Abstract: A driver circuit integrated with a load current output circuit has a function as a driver for applying a predetermined test waveform to a device under test (DUT), and a function as a load current output for reproducing an actual use situation by receiving the load current to the DUT to judge a response waveform by receiving the response waveform from the DUT. Both functions are made up on a common circuit, operate as the driver circuit when applying the test waveform, and operate as the load current output circuit when judging the response waveform.
    Type: Application
    Filed: December 27, 2001
    Publication date: November 21, 2002
    Applicant: Hitachi Electronics Engineering Co., Ltd
    Inventors: Keizo Takechi, Akio Ohsaki, Yoshihiko Hayashi, Kazuhiko Murata