Inventor
TAMAGAWA AKIO
JP18 patents
⚠️ This page may combine multiple inventors who share the name “TAMAGAWA AKIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
10 patentsUS5532916AJul 2, 1996
Voltage converting circuit and multiphase clock generating circuit used for driving the same
NEC CORP224 citations98
US5461557AOct 24, 1995
Voltage converting circuit and multiphase clock generating circuit used for driving the same
NEC CORP87 citations96
US5061862AOct 29, 1991
Reference voltage generating circuit
NEC CORP61 citations96
US5754078AMay 19, 1998
Operational amplifier for class B amplification
NEC CORP49 citations92
US5623222AApr 22, 1997
Voltage converting circuit and multiphase clock generating circuit used for driving the same
NEC CORP34 citations92
US5339236AAug 16, 1994
Charge pump circuit for intermediate voltage between power supply voltage and its double voltage
NEC CORP49 citations92
US5254487AOct 19, 1993
Method of manufacturing high and low voltage CMOS transistors on a single chip
NEC CORP36 citations92
US5045900ASep 3, 1991
Semiconductor device having a vertical power MOSFET fabricated in an isolated form on a semiconductor substrate
NEC CORP36 citations92
US5151666ASep 29, 1992
Oscillation stoppage detection circuit
NEC CORP11 citations73
US6046491AApr 4, 2000
Semiconductor resistor element having improved resistance tolerance and semiconductor device therefor
NEC CORP6 citations62
NEC ELECTRONICS CORP
4 patentsUS6661260B2Dec 9, 2003
Output circuit of semiconductor circuit with power consumption reduced
NEC ELECTRONICS CORP23 citations92
US7540657B2Jun 2, 2009
Temperature detection circuit
NEC ELECTRONICS CORP11 citations81
US7350974B2Apr 1, 2008
Temperature detection circuit
NEC ELECTRONICS CORP10 citations81
US7545198B2Jun 9, 2009
Semiconductor device
NEC ELECTRONICS CORP3 citations62