Inventor
FUJIWARA HIROFUMI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “FUJIWARA HIROFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC ELECTRONICS CORP
7 patentsUS7663427B2Feb 16, 2010
Booster circuit
NEC ELECTRONICS CORP24 citations92
US7505290B2Mar 17, 2009
Power supply apparatus including charge-pump type step-up circuit having different discharging time constants
NEC ELECTRONICS CORP22 citations92
US7183837B2Feb 27, 2007
Charge pump circuit with latch-up prevention
NEC ELECTRONICS CORP13 citations83
US7855532B2Dec 21, 2010
Power supply circuit with control switches to voltage multiplier having same frequency as clock
NEC ELECTRONICS CORP5 citations62
US7741899B2Jun 22, 2010
Step-up power supply circuit and stepping-up method
NEC ELECTRONICS CORP6 citations62
US7324358B2Jan 29, 2008
Power supply apparatus including charge-pump type step-up circuit operated at clock signal frequency
NEC ELECTRONICS CORP5 citations62
US7608946B2Oct 27, 2009
Boosting circuit and integrated circuit having the same
NEC ELECTRONICS CORP0 citations51