Inventor
TAKIMOTO KYUICHI
JP22 patents
Patents
22 patentsUS6194875B1Feb 27, 2001
Controller for DC-DC converter
FUJITSU LTD62 citations96
US7262587B2Aug 28, 2007
Circuit and method for controlling DC-DC converter
FUJITSU LTD54 citations94
US7045990B2May 16, 2006
Portable device having a charging circuit and semiconductor device for use in the charging circuit of the same
FUJITSU LTD31 citations92
US6828764B2Dec 7, 2004
Regulator circuit and control method thereof
FUJITSU LTD25 citations92
US6724175B1Apr 20, 2004
Power supply control device, power supply circuit, power supply control method, and electronic apparatus controlling output voltage thereof in accordance with a voltage detected across an on switching element
FUJITSU LTD29 citations92
US6696821B2Feb 24, 2004
DC-DC converter, duty-ratio setting circuit and electric appliance using them
FUJITSU LTD34 citations92
US6664772B2Dec 16, 2003
DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon
FUJITSU LTD19 citations92
US6337563B2Jan 8, 2002
DC-DC converter and semicondutor integrated circuit device for DC-DC converter
FUJITSU LTD49 citations92
US6147477ANov 14, 2000
DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon
FUJITSU LTD32 citations92
US6025706AFeb 15, 2000
Method for controlling the output voltage of a DC-DC converter
FUJITSU LTD32 citations92
US5966003AOct 12, 1999
DC-DC converter control circuit
FUJITSU LTD41 citations92
US7098639B2Aug 29, 2006
DC-DC converter and method for controlling DC-DC converter
FUJITSU LTD27 citations91
US7176663B2Feb 13, 2007
Control circuit for DC/DC converter
FUJITSU LTD14 citations84
US5850137ADec 15, 1998
Charging apparatus and current/voltage detector for use therein
FUJITSU LTD17 citations84
US7019501B2Mar 28, 2006
DC/DC converter
FUJITSU LTD17 citations83
US6674657B2Jan 6, 2004
Overvoltage-protective device for power system, AC/DC converter and DC/DC converter constituting the power system
FUJITSU LTD16 citations83
US6587006B2Jul 1, 2003
Oscillator circuit
FUJITSU LTD19 citations79
US6911806B2Jun 28, 2005
DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon
FUJITSU LTD10 citations74
US6882133B2Apr 19, 2005
DC/DC converter control circuits and DC/DC converter systems with power saving mode in accordance with an external control signal
FUJITSU LTD9 citations74
US5218319AJun 8, 1993
Differential amplifier and active filter using the same
FUJITSU LTD11 citations74
US5539302AJul 23, 1996
Reference power supply
FUJITSU LTD13 citations73
US7129682B2Oct 31, 2006
DC to DC converter producing output voltage exhibit rise and fall characteristics independent of load thereon
FUJITSU LTD1 citations63