Patents by Inventor Chikao MIYAZAKI

Chikao MIYAZAKI 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).

  • DA converter and solid-state imaging device that provides reduced power consumption
    Patent number: 8587707
    Abstract: A DA converter includes: a reference current generating circuit that generates a reference current; current sources that supply currents according to the reference current; a voltage output circuit that outputs a voltage according to a current to be supplied thereto; switch circuits provided for the current sources respectively to each switch a connection of each of the current sources to the voltage output circuit or a predetermined load; a control section that controls the switch circuits based on an input digital signal to select that of the current sources which is to be connected to the voltage output circuit, and outputs a voltage according to the digital signal from the voltage output circuit; and a switch that stops an operation of at least one of the current sources based on a control signal from the control section, without stopping an operation of the reference current generating circuit.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: November 19, 2013
    Assignee: Sony Corporation
    Inventors: Shizunori Matsumoto, Chikao Miyazaki
  • DA CONVERTER AND SOLID-STATE IMAGING DEVICE
    Publication number: 20110050967
    Abstract: A DA converter includes: a reference current generating circuit that generates a reference current; current sources that supply currents according to the reference current; a voltage output circuit that outputs a voltage according to a current to be supplied thereto; switch circuits provided for the current sources respectively to each switch a connection of each of the current sources to the voltage output circuit or a predetermined load; a control section that controls the switch circuits based on an input digital signal to select that of the current sources which is to be connected to the voltage output circuit, and outputs a voltage according to the digital signal from the voltage output circuit; and a switch that stops an operation of at least one of the current sources based on a control signal from the control section, without stopping an operation of the reference current generating circuit.
    Type: Application
    Filed: July 28, 2010
    Publication date: March 3, 2011
    Applicant: Sony Corporation
    Inventors: Shizunori MATSUMOTO, Chikao MIYAZAKI