Inventor
IGARASHI SEIKI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “IGARASHI SEIKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJI ELECTRIC CO LTD
13 patentsUS5616955AApr 1, 1997
Power transistor module wiring structure
FUJI ELECTRIC CO LTD61 citations94
US6339262B1Jan 15, 2002
Switching power supply using an input DC power supply
FUJI ELECTRIC CO LTD28 citations92
US6288595B1Sep 11, 2001
On-delay-compensating arm on-detection circuit
FUJI ELECTRIC CO LTD37 citations92
US6111762AAug 29, 2000
Switching power supply
FUJI ELECTRIC CO LTD40 citations92
US6108218AAug 22, 2000
Switching power supply with power factor control
FUJI ELECTRIC CO LTD33 citations92
US6459597B1Oct 1, 2002
Electric power conversion apparatus with noise reduction device
FUJI ELECTRIC CO LTD42 citations91
US5936387AAug 10, 1999
Gate drive circuit for power converters that reduces surge voltages
FUJI ELECTRIC CO LTD40 citations89
US5889663AMar 30, 1999
Circuit for balancing steady-state currents of switching devices in electric power converter
FUJI ELECTRIC CO LTD53 citations89
US6657873B2Dec 2, 2003
Switching power supply circuit
FUJI ELECTRIC CO LTD9 citations73
US5202619AApr 13, 1993
Control circuit for a switching transistor
FUJI ELECTRIC CO LTD11 citations68
US12557705B2Feb 17, 2026
Semiconductor unit
FUJI ELECTRIC CO LTD0 citations51
US11621626B2Apr 4, 2023
Driving apparatus, semiconductor apparatus, and driving method
FUJI ELECTRIC CO LTD0 citations51
US10566966B2Feb 18, 2020
Semiconductor device and oscillation suppressing device
FUJI ELECTRIC CO LTD0 citations37