Patents by Inventor Kenji SHIMOMAKI

Kenji SHIMOMAKI 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).

  • Operational amplifying circuit and liquid crystal panel drive device using the same
    Patent number: 9922615
    Abstract: An operational amplifier circuit includes: a first differential amplifier section containing a P-type differential pair of P-type transistors; a second differential amplifier section containing an N-type differential pair of N-type transistors; an intermediate stage connected with outputs of the first and second differential amplifier sections and containing a first current mirror circuit of P-type transistors, and a second current mirror circuit of N-type transistors; and an output stage configured to amplify an output of the intermediate stage in power. The first differential amplifier section includes a first current source and a first capacitance between sources of the P-type transistors of the P-type differential pair and a positive side power supply voltage. The second differential amplifier section includes a second current source and a second capacitance between sources of the N-type transistors of the N-type differential pair and a negative side power supply voltage.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: March 20, 2018
    Assignee: Renesas Electronics Corporation
    Inventor: Kenji Shimomaki
  • OPERATIONAL AMPLIFYING CIRCUIT AND LIQUID CRYSTAL PANEL DRIVE DEVICE USING THE SAME
    Publication number: 20170032760
    Abstract: An operational amplifier circuit includes: a first differential amplifier section containing a P-type differential pair of P-type transistors; a second differential amplifier section containing an N-type differential pair of N-type transistors; an intermediate stage connected with outputs of the first and second differential amplifier sections and containing a first current mirror circuit of P-type transistors, and a second current mirror circuit of N-type transistors; and an output stage configured to amplify an output of the intermediate stage in power. The first differential amplifier section includes a first current source and a first capacitance between sources of the P-type transistors of the P-type differential pair and a positive side power supply voltage. The second differential amplifier section includes a second current source and a second capacitance between sources of the N-type transistors of the N-type differential pair and a negative side power supply voltage.
    Type: Application
    Filed: October 12, 2016
    Publication date: February 2, 2017
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventor: Kenji SHIMOMAKI
  • Operational amplifying circuit and liquid crystal panel drive device using the same
    Patent number: 9496834
    Abstract: An operational amplifier circuit includes: a first differential amplifier section containing a P-type differential pair of P-type transistors; a second differential amplifier section containing an N-type differential pair of N-type transistors; an intermediate stage connected with outputs of the first and second differential amplifier sections and containing a first current mirror circuit of P-type transistors, and a second current mirror circuit of N-type transistors; and an output stage configured to amplify an output of the intermediate stage in power. The first differential amplifier section includes a first current source and a first capacitance between sources of the P-type transistors of the P-type differential pair and a positive side power supply voltage. The second differential amplifier section includes a second current source and a second capacitance between sources of the N-type transistors of the N-type differential pair and a negative side power supply voltage.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: November 15, 2016
    Assignee: Renesas Electronics Corporation
    Inventor: Kenji Shimomaki
  • OPERATIONAL AMPLIFYING CIRCUIT AND LIQUID CRYSTAL PANEL DRIVE DEVICE USING THE SAME
    Publication number: 20150356941
    Abstract: An operational amplifier circuit includes: a first differential amplifier section containing a P-type differential pair of P-type transistors; a second differential amplifier section containing an N-type differential pair of N-type transistors; an intermediate stage connected with outputs of the first and second differential amplifier sections and containing a first current mirror circuit of P-type transistors, and a second current mirror circuit of N-type transistors; and an output stage configured to amplify an output of the intermediate stage in power. The first differential amplifier section includes a first current source and a first capacitance between sources of the P-type transistors of the P-type differential pair and a positive side power supply voltage. The second differential amplifier section includes a second current source and a second capacitance between sources of the N-type transistors of the N-type differential pair and a negative side power supply voltage.
    Type: Application
    Filed: August 18, 2015
    Publication date: December 10, 2015
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventor: Kenji SHIMOMAKI
  • Operational amplifying circuit and liquid crystal panel drive device using the same
    Patent number: 9143102
    Abstract: An operational amplifier circuit includes: a first differential amplifier section containing a P-type differential pair of P-type transistors; a second differential amplifier section containing an N-type differential pair of N-type transistors; an intermediate stage connected with outputs of the first and second differential amplifier sections and containing a first current mirror circuit of P-type transistors, and a second current mirror circuit of N-type transistors; and an output stage configured to amplify an output of the intermediate stage in power. The first differential amplifier section includes a first current source and a first capacitance between sources of the P-type transistors of the P-type differential pair and a positive side power supply voltage. The second differential amplifier section includes a second current source and a second capacitance between sources of the N-type transistors of the N-type differential pair and a negative side power supply voltage.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: September 22, 2015
    Assignee: Renesas Electronics Corporation
    Inventor: Kenji Shimomaki
  • OPERATIONAL AMPLIFYING CIRCUIT AND LIQUID CRYSTAL PANEL DRIVE DEVICE USING THE SAME
    Publication number: 20120133688
    Abstract: An operational amplifier circuit includes: a first differential amplifier section containing a P-type differential pair of P-type transistors; a second differential amplifier section containing an N-type differential pair of N-type transistors; an intermediate stage connected with outputs of the first and second differential amplifier sections and containing a first current mirror circuit of P-type transistors, and a second current mirror circuit of N-type transistors; and an output stage configured to amplify an output of the intermediate stage in power. The first differential amplifier section includes a first current source and a first capacitance between sources of the P-type transistors of the P-type differential pair and a positive side power supply voltage. The second differential amplifier section includes a second current source and a second capacitance between sources of the N-type transistors of the N-type differential pair and a negative side power supply voltage.
    Type: Application
    Filed: November 28, 2011
    Publication date: May 31, 2012
    Inventor: Kenji SHIMOMAKI