Inventor
HASEGAWA MORIHITO
JP33 patents
⚠️ This page may combine multiple inventors who share the name “HASEGAWA MORIHITO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
13 patentsUS7456623B2Nov 25, 2008
DC-DC converter and control circuit for DC-DC converter
FUJITSU LTD60 citations98
US7122995B2Oct 17, 2006
Multi-phase DC-DC converter and control circuit for multi-phase DC-DC converter
FUJITSU LTD20 citations93
US7193401B1Mar 20, 2007
Control circuit and control method for DC-DC converter
FUJITSU LTD28 citations92
US6515525B2Feb 4, 2003
Fractional-N-PLL frequency synthesizer and phase error canceling method therefor
FUJITSU LTD29 citations92
US6031425AFeb 29, 2000
Low power prescaler for a PLL circuit
FUJITSU LTD41 citations92
US5896066AApr 20, 1999
PLL synthesizer having a reset circuit
FUJITSU LTD26 citations92
US7279870B2Oct 9, 2007
DC-DC converter and method of controlling DC-DC converter
FUJITSU LTD10 citations84
US7268448B2Sep 11, 2007
Plural output switching regulator with phase comparison and delay means
FUJITSU LTD15 citations84
US7298117B2Nov 20, 2007
Step-up (boost) DC regulator with two-level back-bias switch gate voltage
FUJITSU LTD11 citations82
US7423415B2Sep 9, 2008
DC-DC converter and its control method, and switching regulator and its control method
FUJITSU LTD7 citations74
US7279990B2Oct 9, 2007
Sigma-delta modulator for PLL circuits
FUJITSU LTD4 citations63
US7224152B2May 29, 2007
DC-DC converter and control circuit for DC-DC converter
FUJITSU LTD4 citations63
US7388438B2Jun 17, 2008
ΣΔ modulator for PLL circuit
FUJITSU LTD0 citations52
FUJITSU SEMICONDUCTOR LTD
10 patentsUS7843179B2Nov 30, 2010
Control circuit for synchronous rectifier-type DC-DC converter, synchronous rectifier-type DC-DC converter and control method thereof
FUJITSU SEMICONDUCTOR LTD27 citations92
US7821236B2Oct 26, 2010
Control circuit for detecting a reverse current in a DC-DC converter
FUJITSU SEMICONDUCTOR LTD25 citations92
US7777473B2Aug 17, 2010
DC-DC converter and control circuit for DC-DC converter
FUJITSU SEMICONDUCTOR LTD8 citations84
US7936156B2May 3, 2011
DC-DC converter and control method thereof
FUJITSU SEMICONDUCTOR LTD7 citations82
US7957165B2Jun 7, 2011
DC-DC converter with a plurality of soft-start control circuits
FUJITSU SEMICONDUCTOR LTD6 citations63
US7944190B2May 17, 2011
Control circuit of power supply unit which controls output power of external power supply based upon current from the external power supply, power supply unit and control method thereof
FUJITSU SEMICONDUCTOR LTD4 citations63
US7876076B2Jan 25, 2011
Circuit for preventing through current in DC-DC converter
FUJITSU SEMICONDUCTOR LTD4 citations63
US7781909B2Aug 24, 2010
Control circuit of power supply, power supply and control method thereof
FUJITSU SEMICONDUCTOR LTD4 citations63
US7916503B2Mar 29, 2011
DC-DC converter, power supply voltage supplying method, and power supply voltage supplying system
FUJITSU SEMICONDUCTOR LTD3 citations62
US7948219B2May 24, 2011
Control circuit of synchronous rectification type power supply unit, synchronous rectification type power supply unit and control method thereof
FUJITSU SEMICONDUCTOR LTD0 citations42
FUJITSU MICROELECTRONICS LTD
5 patentsUS7609039B2Oct 27, 2009
Controller and control method for DC-DC converter
FUJITSU MICROELECTRONICS LTD55 citations98
US7733074B2Jun 8, 2010
Control circuit of current mode DC-DC converter and control method of current mode DC-DC converter
FUJITSU MICROELECTRONICS LTD14 citations84
US7714557B2May 11, 2010
DC-DC converter, power supply system, and power supply method
FUJITSU MICROELECTRONICS LTD9 citations84
US7705483B2Apr 27, 2010
DC-DC converter control circuit, DC-DC converter, power supply unit, and DC-DC converter control method
FUJITSU MICROELECTRONICS LTD7 citations74
US7545054B2Jun 9, 2009
DC linear regulator single controller with plural loads
FUJITSU MICROELECTRONICS LTD4 citations63
HASEGAWA MORIHITO
4 patentsUS8248046B2Aug 21, 2012
DC-DC converter for pulse frequency modulation control and power supply system
HASEGAWA MORIHITO27 citations92
US8233257B2Jul 31, 2012
Power supply circuit, overcurrent protection circuit for the same, and electronic device
HASEGAWA MORIHITO7 citations81
US8760133B2Jun 24, 2014
Linear drop-out regulator circuit
HASEGAWA MORIHITO13 citations77
US8406364B2Mar 26, 2013
Fractional frequency divider PLL device and control method thereof
HASEGAWA MORIHITO0 citations41