Inventor
UMEYAMA TAKEHIKO
JP35 patents
⚠️ This page may combine multiple inventors who share the name “UMEYAMA TAKEHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI ELECTRIC CORP
21 patentsUS6320830B1Nov 20, 2001
Optical information reproduction device and signal processing circuit used therein
MITSUBISHI ELECTRIC CORP35 citations92
US5270883ADec 14, 1993
Magnetic read/write circuit
MITSUBISHI ELECTRIC CORP53 citations92
US6339567B1Jan 15, 2002
Method of and apparatus for optical information reproduction
MITSUBISHI ELECTRIC CORP23 citations91
US5852521ADec 22, 1998
Amplifier circuit suppressing disturbance signal produced by magnetoresistive head
MITSUBISHI ELECTRIC CORP22 citations90
US5557220ASep 17, 1996
Polarity detector
MITSUBISHI ELECTRIC CORP20 citations89
US6683487B2Jan 27, 2004
Current driver circuit for supplying write current to a write head while changing a flow direction of the write current
MITSUBISHI ELECTRIC CORP12 citations74
US6252457B1Jun 26, 2001
Differential amplifier circuit
MITSUBISHI ELECTRIC CORP8 citations74
US6222415B1Apr 24, 2001
Magneto-resistive element signal amplifying circuit
MITSUBISHI ELECTRIC CORP13 citations74
US6201421B1Mar 13, 2001
Write current driving circuit
MITSUBISHI ELECTRIC CORP13 citations74
US5266826ANov 30, 1993
Semiconductor integrated circuit
MITSUBISHI ELECTRIC CORP6 citations74
US5311141AMay 10, 1994
Active filter circuit
MITSUBISHI ELECTRIC CORP9 citations73
US5986840ANov 16, 1999
Amplifier with capacitive feedback for driving a magneto-resistive head
MITSUBISHI ELECTRIC CORP10 citations72
US5834969ANov 10, 1998
Circuit for processing signals from a magneto-resistive head
MITSUBISHI ELECTRIC CORP15 citations71
US6211736B1Apr 3, 2001
Signal amplifying circuit for magnetoresistive element
MITSUBISHI ELECTRIC CORP6 citations63
US5812011ASep 22, 1998
Current switching circuit formed in an integrated semiconductor circuit
MITSUBISHI ELECTRIC CORP2 citations63
US5155429AOct 13, 1992
Threshold voltage generating circuit
MITSUBISHI ELECTRIC CORP4 citations63
US5134313AJul 28, 1992
Peak hold circuit
MITSUBISHI ELECTRIC CORP6 citations62
US5302892AApr 12, 1994
Semiconductor integrated circuit
MITSUBISHI ELECTRIC CORP3 citations61
US6208482B1Mar 27, 2001
Signal amplifying circuit for an MR element
MITSUBISHI ELECTRIC CORP4 citations60
US5694083ADec 2, 1997
Single end input high frequency amplifier
MITSUBISHI ELECTRIC CORP6 citations60
US5453718ASep 26, 1995
Differential amplifier for reducing input capacitance without deterorating noise characteristics
MITSUBISHI ELECTRIC CORP6 citations57
RENESAS TECH CORP
6 patentsUS6783274B2Aug 31, 2004
Device for measuring temperature of semiconductor integrated circuit
RENESAS TECH CORP32 citations91
US7372882B2May 13, 2008
Driving circuit for and semiconductor device for driving laser diode
RENESAS TECH CORP6 citations71
US7643261B2Jan 5, 2010
Semiconductor device
RENESAS TECH CORP2 citations63
US6731449B2May 4, 2004
Magnetic recording writing circuit
RENESAS TECH CORP3 citations61
US7791288B2Sep 7, 2010
Driving circuit for and semiconductor device for driving laser diode
RENESAS TECH CORP3 citations60
US6998733B2Feb 14, 2006
Pulse current generation circuit
RENESAS TECH CORP3 citations51