Patents by Inventor Tetsuo Ichino

Tetsuo Ichino 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).

  • Voltage regulator controller and system including voltage regulator controller
    Patent number: 9276462
    Abstract: Provided is a controller that is capable of reducing fall in a waveform of a power supply voltage when the power supply voltage supplied to a CPU is reduced. A controller for controlling voltage regulators includes a differential amplifier that outputs a measurement voltage corresponding to a power supply voltage supplied to a load and an error amplifier having a non-inverting input terminal supplied with a target voltage and an inverting input terminal supplied with a measurement voltage. The error amplifier compares the target voltage and the measurement voltage and outputs a signal for controlling the voltage regulators. Further included in the controller is a correction circuit that applies an offset voltage to the inverting input terminal of the error amplifier when the power supply voltage supplied to the load is reduced.
    Type: Grant
    Filed: September 14, 2013
    Date of Patent: March 1, 2016
    Assignee: Renesas Electronics Corporation
    Inventors: Hiroshi Murakami, Tetsuo Ichino, Shigeru Kurita, Toshio Nagasawa, Takuya Makise
  • CONTROLLER AND SYSTEM INCLUDING CONTROLLER
    Publication number: 20140077781
    Abstract: Provided is a controller that is capable of reducing fall in a waveform of a power supply voltage when the power supply voltage supplied to a CPU is reduced. A controller for controlling voltage regulators includes a differential amplifier that outputs a measurement voltage corresponding to a power supply voltage supplied to a load and an error amplifier having a non-inverting input terminal supplied with a target voltage and an inverting input terminal supplied with a measurement voltage. The error amplifier compares the target voltage and the measurement voltage and outputs a signal for controlling the voltage regulators. Further included in the controller is a correction circuit that applies an offset voltage to the inverting input terminal of the error amplifier when the power supply voltage supplied to the load is reduced.
    Type: Application
    Filed: September 14, 2013
    Publication date: March 20, 2014
    Inventors: Hiroshi Murakami, Tetsuo Ichino, Shigeru Kurita, Toshio Nagasawa, Takuya Makise