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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Takemura; Ko
Address:
Kyoto, JP
No. of patents:
21
Patents:












Patent Number Title Of Patent Date Issued
8072201 Power supply apparatus December 6, 2011
In a power supply apparatus that is so configured as to produce from an input voltage an output voltage Vo within a predetermined permissible variation range, the output voltage Vo is so controlled as to decrease within the permissible variation range as the output current Io increas
7663355 Power supply apparatus February 16, 2010
In a power supply apparatus that is so configured as to produce from an input voltage an output voltage Vo within a predetermined permissible variation range, the output voltage Vo is so controlled as to decrease within the permissible variation range as the output current Io increas
7612545 DC/DC converter November 3, 2009
A DC/DC converter includes a switching element which is opened and closed to supply power from an input power supply V.sub.cc through a coil to an output terminal, which is connected to a load, and to adjust the voltage at the output terminal. The DC/DC converter also includes a coil cur
7486061 Power supply apparatus February 3, 2009
In a power supply apparatus that is so configured as to produce from an input voltage an output voltage Vo within a predetermined permissible variation range, the output voltage Vo is so controlled as to decrease within the permissible variation range as the output current Io increas
7221132 Power supply circuit May 22, 2007
A power supply circuit relating to the present invention comprises a differential amplifier for feeding out a voltage as a control voltage in accordance with a difference between a feedback voltage commensurate with an output voltage and a reference voltage, an output current control
7202647 Power supply circuit April 10, 2007
A power supply circuit relating to the present invention comprises a differential amplifier for feeding out a voltage as a control voltage in accordance with a difference between a feedback voltage commensurate with an output voltage and a reference voltage, an output current control
7196888 Method of fabricating semiconductor integrated circuit device having protection circuit March 27, 2007
A method of fabricating a semiconductor integrated circuit device is provided. The device includes a protection circuit that connects to a terminal and has a protection diode and a current mirror circuit. The current mirror circuit includes first and second transistors having bases t
7148667 Power supply apparatus December 12, 2006
In a power supply apparatus that is so configured as to produce from an input voltage an output voltage Vo within a predetermined permissible variation range, the output voltage Vo is so controlled as to decrease within the permissible variation range as the output current Io increas
7095219 Electric power supply unit having improved output voltage response August 22, 2006
The power supply unit is provided with a power supply circuit adapted to generate an output voltage in accord with an instruction voltage, an output condenser Co connected to the output end of the power supply circuit, and an auxiliary output voltage setting circuit adapted to compar
7071663 Power supply circuit July 4, 2006
A power supply circuit relating to the present invention comprises a differential amplifier for feeding out a voltage as a control voltage in accordance with a difference between a feedback voltage commensurate with an output voltage and a reference voltage, an output current control
7046533 DC/DC converter May 16, 2006
In a DC/DC converter having a plurality of DC/DC converters, to prevent faults in the circuit and the circuit elements constituting it even when the balance of current limiting operation among the individual DC/DC converters is disturbed due to individual and temperature-related vari
6954055 Switching device driving apparatus and DC/DC converter incorporating the same October 11, 2005
A switching device driving apparatus has a driver for controlling, according to an input signal, the on/off states of a pair of field-effect transistors connected in series between a first supply voltage and a second supply voltage lower than the first supply voltage, and a detector
6949917 Switching power supply unit September 27, 2005
A switching power supply unit generates a pulse signal having a duty factor based on the voltage associated with the difference between a reference voltage and the output voltage of the unit, and the voltage associated with the current flowing through a smoothing coil. Upon receipt of th
6924533 Semiconductor integrated circuit device incorporating overvoltage protection circuit August 2, 2005
To a plurality of terminals are connected, one to one, a plurality of current mirror circuits each having a first load portion through which a first current flows when an overvoltage is applied and a second load portion through which a second current proportional to the first current
6922042 DC/DC converter July 26, 2005
A DC/DC converter produces from an input voltage a desired output voltage by first finding the error voltage between the output voltage and a first reference voltage and then controlling the output current according to the differential voltage between the error voltage and a second refer
6917189 Electric power supply unit having improved output voltage response July 12, 2005
The power supply unit is provided with a power supply circuit adapted to generate an output voltage in accord with an instruction voltage, an output condenser Co connected to the output end of the power supply circuit, and an auxiliary output voltage setting circuit adapted to compar
6894470 Power supply device and electric appliance employing the same May 17, 2005
A power supply device has a reference voltage generator for generating a reference voltage, a monitor voltage generator for generating a monitor voltage that varies according to an output voltage, an output controller for producing the output voltage from an input voltage in such a way t
6891736 Multiphase DC/DC converter May 10, 2005
In a multiphase DC/DC converter having a plurality of DC/DC converters, to prevent faults in the circuit and the circuit elements constituting it even when the balance of current limiting operation among the individual DC/DC converters is disturbed due to individual and temperature-relat
6815939 Switching power supply unit November 9, 2004
A switching power supply unit generates a pulse signal having a duty factor based on the voltage associated with the difference between a reference voltage and the output voltage of the unit, and the voltage associated with the current flowing through a smoothing coil. Upon receipt of th
6784724 Constant voltage generating circuit August 31, 2004
A constant voltage generating circuit has a reference voltage generating circuit of which the output voltage is controlled to be a constant voltage when the output voltage has risen, with an increase in the input supply voltage, to reach a predetermined voltage and that outputs the const
6703955 Variable-output-characteristic semiconductor integrated circuit device March 9, 2004
In a semiconductor integrated circuit device, a reference voltage is connected to one input terminal of an amplifier, and the voltage appearing on the output side is divided by a plurality of resistors and is negatively fed back to the other input terminal of the amplifier to control










 
 
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