Patents by Inventor Yuhji Ichikawa

Yuhji Ichikawa 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).

  • CASCODE CIRCUIT DEVICE WITH IMPROVED REVERSE RECOVERY CHARACTERISTIC
    Publication number: 20140167100
    Abstract: A semiconductor device including: an FET; a MOSFET having a drain thereof connected with a source of the FET; a resistor having one end thereof connected with a gate of the FET and having the other end thereof connected with a source of the MOSFET; and a diode having an anode thereof connected with the gate of the FET and having a cathode thereof connected with the source of the MOSFET.
    Type: Application
    Filed: February 24, 2014
    Publication date: June 19, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yuhji ICHIKAWA
  • Cascode circuit device with improved reverse recovery characteristic
    Patent number: 8710543
    Abstract: A semiconductor device including: an FET; a MOSFET having a drain thereof connected with a source of the FET; a resistor having one end thereof connected with a gate of the FET and having the other end thereof connected with a source of the MOSFET; and a diode having an anode thereof connected with the gate of the FET and having a cathode thereof connected with the source of the MOSFET.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: April 29, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yuhji Ichikawa
  • SEMICONDUCTOR DEVICE AND ELECTRONIC DEVICE
    Publication number: 20120280271
    Abstract: A semiconductor device including: an FET; a MOSFET having a drain thereof connected with a source of the FET; a resistor having one end thereof connected with a gate of the FET and having the other end thereof connected with a source of the MOSFET; and a diode having an anode thereof connected with the gate of the FET and having a cathode thereof connected with the source of the MOSFET.
    Type: Application
    Filed: April 30, 2012
    Publication date: November 8, 2012
    Inventor: Yuhji ICHIKAWA
  • Biological Signal Measurement Device, Biological Signal Measurement Method, And Computer Program
    Publication number: 20080171915
    Abstract: A biological signal measurement device includes: a circular or hyperbolic fitting section (101) to be worn on a part of a human body; a sensing section (103) which is provided to the fitting section (101), and senses a biological signal by being closely attached to a specific part of the human body; a measurement environment judging section for judging an environment for measuring the biological signal by using the sensing section (103); a measurement environment notifying section (104) for notifying a user of a judgment result, according to the result of judgment performed by the measurement environment judging section; and a measurement environment adjusting section (102) for adjusting the measurement environment of the sensing section (103). Thus, it is possible to provide a human-wearable biological signal measurement device that allows easier maintenance of suitable measurement conditions.
    Type: Application
    Filed: September 20, 2005
    Publication date: July 17, 2008
    Inventors: Momoe Kawajiri, Kazuhiko Ashihara, Yuhji Ichikawa, Katsuya Nakagawa