Inventor
YAMAGUCHI ATSUO
JP36 patents
⚠️ This page may combine multiple inventors who share the name “YAMAGUCHI ATSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI ELECTRIC CORP
26 patentsUS5874725AFeb 23, 1999
Non-contact IC card with phase variation detector
MITSUBISHI ELECTRIC CORP100 citations99
US5056089AOct 8, 1991
Memory device
MITSUBISHI ELECTRIC CORP155 citations99
US6107864AAug 22, 2000
Charge pump circuit
MITSUBISHI ELECTRIC CORP142 citations98
US5831257ANov 3, 1998
Non-contact IC card including phase-locked loop circuitry
MITSUBISHI ELECTRIC CORP34 citations96
US5801372ASep 1, 1998
Non-contact IC card with antenna switching circuit
MITSUBISHI ELECTRIC CORP81 citations96
US5698838ADec 16, 1997
Non-contact IC card including antenna circuit with adjustable resonant frequency
MITSUBISHI ELECTRIC CORP72 citations96
US5535160AJul 9, 1996
Semiconductor integrated circuit
MITSUBISHI ELECTRIC CORP60 citations96
US5068521ANov 26, 1991
Non-contact ic card
MITSUBISHI ELECTRIC CORP74 citations96
US5047924ASep 10, 1991
Microcomputer
MITSUBISHI ELECTRIC CORP78 citations96
US6747548B1Jun 8, 2004
Non-contact IC card system and non-contact IC card
MITSUBISHI ELECTRIC CORP28 citations92
US5942926AAug 24, 1999
PLL circuit
MITSUBISHI ELECTRIC CORP20 citations92
US5375083ADec 20, 1994
Semiconductor integrated circuit including a substrate having a memory cell array surrounded by a well structure
MITSUBISHI ELECTRIC CORP23 citations92
US5226167AJul 6, 1993
Microcomputer circuit for attenuating oscillations in a resonant circuit by reversing phase and feeding back resonant circuit output oscillation voltage
MITSUBISHI ELECTRIC CORP40 citations92
US5036460AJul 30, 1991
Microprocessor having miswriting preventing function
MITSUBISHI ELECTRIC CORP42 citations92
US5594692AJan 14, 1997
Semiconductor integrated circuit
MITSUBISHI ELECTRIC CORP14 citations74
US5517460AMay 14, 1996
Semiconductor integrated circuit and IC card using the same
MITSUBISHI ELECTRIC CORP15 citations74
US5432328AJul 11, 1995
Non-contact IC card detecting power-on signal by receiving external input signal having voltage magnitude outside power supply voltage range
MITSUBISHI ELECTRIC CORP16 citations74
US5396056AMar 7, 1995
Non-contact IC card having an active attenuation circuit
MITSUBISHI ELECTRIC CORP10 citations74
US5365047ANov 15, 1994
IC card with clock signal input control
MITSUBISHI ELECTRIC CORP18 citations74
US5308968AMay 3, 1994
Non-contact IC card which actively attenuates its resonance circuit as it receives data
MITSUBISHI ELECTRIC CORP13 citations74
US5159183AOct 27, 1992
Ic card
MITSUBISHI ELECTRIC CORP13 citations74
US5039850AAug 13, 1991
IC card
MITSUBISHI ELECTRIC CORP18 citations74
US5019970AMay 28, 1991
IC card
MITSUBISHI ELECTRIC CORP18 citations74
US5016212AMay 14, 1991
IC card having system ROM selection inhibit
MITSUBISHI ELECTRIC CORP13 citations74
US4924465AMay 8, 1990
Memory with function test of error detection/correction device
MITSUBISHI ELECTRIC CORP15 citations74
US5160856ANov 3, 1992
Reference voltage regulator semiconductor integrated circuit
MITSUBISHI ELECTRIC CORP4 citations60
RENESAS TECH CORP
3 patentsUS7424500B2Sep 9, 2008
Random number generator with ring oscillation circuit
RENESAS TECH CORP45 citations96
US7171437B2Jan 30, 2007
Residue calculating unit immune to power analysis
RENESAS TECH CORP5 citations63
US7471789B2Dec 30, 2008
Encryption circuit achieving higher operation speed
RENESAS TECH CORP0 citations42