Inventor
TAKAZAWA HIROYUKI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “TAKAZAWA HIROYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
6 patentsUS6528378B2Mar 4, 2003
Semiconductor device
HITACHI LTD19 citations92
US6392258B1May 21, 2002
High speed heterojunction bipolar transistor, and RF power amplifier and mobile communication system using the same
HITACHI LTD31 citations92
US7768066B2Aug 3, 2010
Semiconductor device and electrical circuit device using thereof
HITACHI LTD11 citations83
US6576937B2Jun 10, 2003
Semiconductor device and power amplifier using the same
HITACHI LTD7 citations73
US5739559AApr 14, 1998
Compound semiconductor integrated circuit with a particular high resistance layer
HITACHI LTD14 citations73
US5523593AJun 4, 1996
Compound semiconductor integrated circuit and optical regenerative repeater using the same
HITACHI LTD11 citations70
RENESAS TECH CORP
4 patentsUS7307298B2Dec 11, 2007
Semiconductor device
RENESAS TECH CORP20 citations92
US7783265B2Aug 24, 2010
Switching element, antenna switch circuit and radio frequency module using the same
RENESAS TECH CORP4 citations62
US6787817B2Sep 7, 2004
Compound semiconductor having a doped layer between the gate and an ohmic contact of an active region
RENESAS TECH CORP2 citations62
US6724020B2Apr 20, 2004
Semiconductor device and power amplifier using the same
RENESAS TECH CORP0 citations52
RENESAS ELECTRONICS CORP
3 patentsUS7899412B2Mar 1, 2011
Switching element, antenna switch circuit and radio frequency module using the same
RENESAS ELECTRONICS CORP2 citations62
US7838914B2Nov 23, 2010
Semiconductor device
RENESAS ELECTRONICS CORP1 citations62
US8385847B2Feb 26, 2013
Switching element, antenna switch circuit and radio frequency module using the same
RENESAS ELECTRONICS CORP0 citations52