Inventor
KOKAMI YASUHIKO
JP37 patents
⚠️ This page may combine multiple inventors who share the name “KOKAMI YASUHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RENESAS TECH CORP
14 patentsUS7492132B2Feb 17, 2009
Switching regulator
RENESAS TECH CORP40 citations93
US6757129B2Jun 29, 2004
Magnetic disk storage apparatus
RENESAS TECH CORP42 citations93
US7723937B2May 25, 2010
Drive control device of motor and a method of start-up
RENESAS TECH CORP21 citations92
US7294982B2Nov 13, 2007
Motor drive device and integrated circuit device for motor driving
RENESAS TECH CORP23 citations92
US7280308B2Oct 9, 2007
Motor drive semiconductor integrated circuit and magnetic disk storage apparatus
RENESAS TECH CORP28 citations92
US7088063B2Aug 8, 2006
Motor drive device and integrated circuit device for motor driving
RENESAS TECH CORP33 citations92
US6998801B2Feb 14, 2006
Motor drive device and motor drive integrated circuit device
RENESAS TECH CORP36 citations92
US6771033B2Aug 3, 2004
Drive control system for sensor-less motor
RENESAS TECH CORP31 citations91
US6903894B2Jun 7, 2005
Magnetic disc storage apparatus
RENESAS TECH CORP15 citations83
US7411365B2Aug 12, 2008
Drive control device of motor and a method of start-up
RENESAS TECH CORP6 citations74
US6975479B2Dec 13, 2005
Magnetic disc storage apparatus
RENESAS TECH CORP8 citations72
US6801382B2Oct 5, 2004
Magnetic disk storage apparatus
RENESAS TECH CORP10 citations72
US7847500B2Dec 7, 2010
Synchronous motor control device
RENESAS TECH CORP4 citations63
US7750586B2Jul 6, 2010
Drive control device of motor and a method of start-up
RENESAS TECH CORP5 citations63
RENESAS ELECTRONICS CORP
8 patentsUS7859324B2Dec 28, 2010
Power supply unit
RENESAS ELECTRONICS CORP22 citations92
US7915844B2Mar 29, 2011
Motor driving apparatus and method for control of motor revolution
RENESAS ELECTRONICS CORP8 citations84
US7848044B2Dec 7, 2010
VCM driver and PWM amplifier
RENESAS ELECTRONICS CORP8 citations84
US7859209B2Dec 28, 2010
Control device for synchronous motor
RENESAS ELECTRONICS CORP7 citations74
US8362727B2Jan 29, 2013
Control device for synchronous motor
RENESAS ELECTRONICS CORP2 citations63
US8004349B2Aug 23, 2011
Power supply unit
RENESAS ELECTRONICS CORP0 citations52
US11575319B2Feb 7, 2023
DC-DC converter
RENESAS ELECTRONICS CORP0 citations49
US10302681B2May 28, 2019
Current detection circuit and semiconductor device including the same
RENESAS ELECTRONICS CORP0 citations37
HITACHI LTD
6 patentsUS6344721B2Feb 5, 2002
Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus
HITACHI LTD47 citations95
US5818179AOct 6, 1998
Brushless motor drive circuit including a linear amplifier for sending an output signal based upon the detected back electromotive force voltage
HITACHI LTD32 citations93
US6563286B2May 13, 2003
Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus
HITACHI LTD23 citations92
US6340873B2Jan 22, 2002
Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus
HITACHI LTD27 citations92
US5847521ADec 8, 1998
Method and apparatus for driving an electric motor
HITACHI LTD29 citations92
US5569988AOct 29, 1996
Brushless motor drive circuit including a linear amplifier for sending and output signal based upon the detected back electromotive force voltage
HITACHI LTD15 citations74
HITACHI ULSI SYS CO LTD
4 patentsUS6972918B2Dec 6, 2005
Magnetic disk memory system
HITACHI ULSI SYS CO LTD64 citations96
US7158332B2Jan 2, 2007
Magnetic disk storage system
HITACHI ULSI SYS CO LTD32 citations92
US7071640B2Jul 4, 2006
Rotation drive control circuit of multiphases direct current motor and the start-up method thereof
HITACHI ULSI SYS CO LTD52 citations92
US7054089B2May 30, 2006
Magnetic disk storage system
HITACHI ULSI SYS CO LTD28 citations92