Inventor
NUNOGAWA YASUHIRO
JP26 patents
⚠️ This page may combine multiple inventors who share the name “NUNOGAWA YASUHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
13 patentsUS6172567B1Jan 9, 2001
Radio communication apparatus and radio frequency power amplifier
HITACHI LTD85 citations97
US6483398B2Nov 19, 2002
Directional coupler, high frequency circuit module and wireless communication system
HITACHI LTD77 citations96
US6433639B1Aug 13, 2002
High frequency power amplifier module and wireless communication system
HITACHI LTD40 citations96
US6330165B1Dec 11, 2001
Semiconductor device
HITACHI LTD74 citations95
US6617927B2Sep 9, 2003
High frequency power amplifier module, and wireless communications system
HITACHI LTD20 citations92
US6489680B2Dec 3, 2002
Semiconductor device
HITACHI LTD15 citations92
US5293077AMar 8, 1994
Power switching circuit
HITACHI LTD48 citations92
US5142171AAug 25, 1992
Integrated circuit for high side driving of an inductive load
HITACHI LTD28 citations92
US6384686B2May 7, 2002
Radio communication apparatus and radio frequency power amplifier
HITACHI LTD8 citations73
US6288612B1Sep 11, 2001
Radio communication apparatus and radio frequency power amplifier
HITACHI LTD8 citations73
US4237487ADec 2, 1980
Monolithic semiconductor integrated circuit for television receivers
HITACHI LTD14 citations72
US6658243B2Dec 2, 2003
High frequency power amplifying apparatus having amplifying stages with gain control signals of lower amplitudes applied to earlier preceding stages
HITACHI LTD7 citations71
US6463267B1Oct 8, 2002
High frequency power amplifying apparatus having amplifying stages with gain control signals of lower amplitudes applied to earlier preceding stages
HITACHI LTD13 citations71
RENESAS TECH CORP
6 patentsUS7193471B2Mar 20, 2007
High frequency power amplifier circuit and radio communication system
RENESAS TECH CORP43 citations92
US7123095B2Oct 17, 2006
High frequency power amplifier circuit and radio communication system
RENESAS TECH CORP25 citations92
US7183856B2Feb 27, 2007
Power source circuit for high frequency power amplifying circuit and semiconductor integrated circuit for power source and electronics component for power source
RENESAS TECH CORP55 citations88
US7053708B2May 30, 2006
Electronic component for high frequency power amplifier and radio communication system
RENESAS TECH CORP15 citations84
US6774725B2Aug 10, 2004
Power supply system for a high frequency power amplifier
RENESAS TECH CORP15 citations82
US7525813B2Apr 28, 2009
Semiconductor device
RENESAS TECH CORP6 citations73
HITACHI TOBU SEMICONDUCTOR LTD
4 patentsUS7145394B2Dec 5, 2006
High frequency power amplifier module, and wireless communication system
HITACHI TOBU SEMICONDUCTOR LTD12 citations92
US6897728B2May 24, 2005
High frequency power amplifier module and wireless communication system
HITACHI TOBU SEMICONDUCTOR LTD9 citations73
US7068521B2Jun 27, 2006
Semiconductor device
HITACHI TOBU SEMICONDUCTOR LTD1 citations62
US6943441B2Sep 13, 2005
Semiconductor device
HITACHI TOBU SEMICONDUCTOR LTD0 citations51