Patents by Inventor Yoichi Takano
Yoichi Takano has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20190302821Abstract: A semiconductor apparatus for power supply control includes the following. A voltage control transistor is connected between a voltage input terminal and an output terminal. A control circuit controls the voltage control transistor according to an output feedback voltage. A first external terminal is supplied with an output control signal to control output voltage is input. The control circuit further includes the following. A first error amplifier outputs a voltage according to an electric potential difference between a voltage divided by a first voltage dividing circuit which divides the output voltage of the output terminal and a predetermined reference voltage. An output changing circuit displaces the reference voltage input in the first error amplifier or the voltage divided by the first voltage dividing circuit according to a voltage input in the first external terminal to change the output voltage to a voltage according to the output control signal.Type: ApplicationFiled: March 13, 2019Publication date: October 3, 2019Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Shinichiro MAKI, Yoichi TAKANO, Katsuhiro YOKOYAMA
-
Patent number: 10296034Abstract: A negative power supply control circuit which controls a negative voltage regulator circuit based on a positive voltage control signal, the negative power supply control circuit including: a control signal input terminal a negative voltage input terminal; a negative voltage input control signal output terminal; a voltage current conversation circuit; a first current source; and a first clamp circuit, wherein the first clamp circuit clamps a voltage at a first intermediate point between the first clamp circuit and the first current source by limiting a current flowing in the first clamp circuit according to the voltage at the first intermediate point in a period when a current flows in the voltage current conversation circuit, and the negative voltage controls signal is generated based on a voltage or a current in a current path through the voltage current conversation circuit, the first clamp circuit and the first current source.Type: GrantFiled: June 27, 2018Date of Patent: May 21, 2019Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Kohei Sakurai, Yoichi Takano
-
Publication number: 20190146535Abstract: A semiconductor integrated circuit for a regulator includes an output controlling transistor, a controller circuit, a breeder resister and a current limiting resistor. The output controlling transistor is connected between an output terminal and a voltage input terminal. The breeder resister is connected between the output terminal and a constant potential point and generates the feedback voltage. The current limiting resistor is connected with the breeder resistor between the output terminal and the constant potential point.Type: ApplicationFiled: November 9, 2018Publication date: May 16, 2019Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Shinichiro MAKI, Yoichi TAKANO, Katsuhiro YOKOYAMA
-
Publication number: 20190004558Abstract: A negative power supply control circuit which controls a negative voltage regulator circuit based on a positive voltage control signal, the negative power supply control circuit including: a control signal input terminal; a negative voltage input terminal; a negative voltage control signal output terminal; a voltage current conversion circuit; a first current source; and a first clamp circuit, wherein the first clamp circuit clamps a voltage at a first intermediate point between the first clamp circuit and the first current source by limiting a current flowing in the first clamp circuit according to the voltage at the first intermediate point in a period when a current flows in the voltage current conversion circuit, and the negative voltage control signal is generated based on a voltage or a current in a current path through the voltage current conversion circuit, the first clamp circuit and the first current source.Type: ApplicationFiled: June 27, 2018Publication date: January 3, 2019Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Kohei SAKURAI, Yoichi TAKANO
-
Patent number: 10063135Abstract: A semiconductor integrated circuit for a regulator includes an opening error detecting circuit detecting an opened state of an output terminal; a short-circuiting error detecting circuit detecting a short-circuiting state thereof; a first output terminal outputting a result detected by the opening error detecting circuit to an external unit; a second output terminal outputting a result detected by the short-circuiting error detecting circuit thereto; and a thermal shutdown circuit detecting the temperature of a semiconductor substrate and turns off the voltage control transistor if the detected temperature of the semiconductor substrate exceeds a predetermined temperature. A signal indicating the logic sum of an output signal of the thermal shutdown circuit and that of the short-circuiting error detecting circuit is outputted from the second output terminal such that the output signal of the opening error detecting circuit is not blocked based on the output signal of the thermal shutdown circuit.Type: GrantFiled: September 29, 2017Date of Patent: August 28, 2018Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Shinichiro Maki, Yoichi Takano, Katsuhiro Yokoyama
-
Publication number: 20180197655Abstract: It is intended to provide a resin composition that serves as a raw material for a printed circuit board excellent in chemical resistance, desmear resistance, and insulation reliability. The resin composition of the present invention contains a maleimide compound, a silane compound having a styrene skeleton and a hydrolyzable group or a hydroxy group, and an inorganic filler.Type: ApplicationFiled: July 4, 2016Publication date: July 12, 2018Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Katsuya TOMIZAWA, Yoichi TAKANO, Meguru ITO, Eisuke SHIGA
-
Publication number: 20180199435Abstract: A resin composition comprising a thermosetting resin, a functional group-modified copolymer, and an inorganic filler, wherein the functional group-modified copolymer has two or more alkyl (meth)acrylate units, or one or two or more alkyl (meth)acrylate units and an acrylonitrile unit, and at least a part of alkyl ester groups of the alkyl (meth)acrylate units and/or a cyano group of the acrylonitrile unit are/is modified with at least one selected from the group consisting of an epoxy group, a carboxyl group, and an amide group.Type: ApplicationFiled: July 4, 2016Publication date: July 12, 2018Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Nobuyoshi OHNISHI, Yoichi TAKANO, Tomo CHIBA, Meguru ITO, Eisuke SHIGA
-
Publication number: 20180186952Abstract: A resin composition containing a compound represented by the following general formula (a) or the following general formula (b), an alkenyl-substituted nadimide compound, and a maleimide compound: wherein Ra represents a group represented by the following general formula (c),Type: ApplicationFiled: July 4, 2016Publication date: July 5, 2018Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Yoichi TAKANO, Katsuya TOMIZAWA, Takashi KUBO, Tomo CHIBA, Eisuke SHIGA
-
Publication number: 20180179353Abstract: The resin composition of the present invention comprises an alkenyl-substituted nadimide (A), a maleimide compound (B), and an amino-modified silicone (C).Type: ApplicationFiled: July 4, 2016Publication date: June 28, 2018Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Yoichi TAKANO, Nobuyoshi OHNISHI, Katsuya TOMIZAWA, Naoki KASHIMA, Hiroshi TAKAHASHI, Eisuke SHIGA
-
Publication number: 20180177047Abstract: The resin composition of the present invention comprises a prepolymer (P) and a thermosetting component, the prepolymer (P) being obtained by polymerizing an alkenyl-substituted nadimide (A), a maleimide compound (B), and an amino-modified silicone (C).Type: ApplicationFiled: July 4, 2016Publication date: June 21, 2018Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Yoichi TAKANO, Nobuyoshi OHNISHI, Hiroshi TAKAHASHI, Eisuke SHIGA
-
Patent number: 9996093Abstract: A semiconductor integrated circuit for a regulator includes the following: a voltage controlling transistor; a controlling circuit; a first and second transistor; a first external terminal to connect a current voltage converting element; a first and second voltage comparing circuit which compares a converted voltage with a predetermined comparison voltage and determines which is large or small; and a first and second output terminal which externally outputs a result of comparison by the first and second voltage comparing circuit, respectively. When a current larger than a predetermined open-circuit abnormality detecting current value flows in the first transistor, output of the first voltage comparing circuit is inverted. When a current larger than a predetermined short-circuit abnormality detecting current value flows in the second transistor, output of the second voltage comparing circuit is inverted.Type: GrantFiled: August 17, 2016Date of Patent: June 12, 2018Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Yoichi Takano, Shinichiro Maki
-
Publication number: 20180155514Abstract: It is intended to provide a resin composition that serves as a raw material for a printed circuit board excellent in heat resistance after moisture absorption and is excellent in moldability. The resin composition of the present invention contains a maleimide compound, a silane compound having a carbon-carbon unsaturated bond and a hydrolyzable group or a hydroxy group, a silane compound having an epoxy skeleton and a hydrolyzable group or a hydroxy group, and an inorganic filler.Type: ApplicationFiled: July 4, 2016Publication date: June 7, 2018Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Katsuya TOMIZAWA, Yoichi TAKANO, Meguru ITO, Eisuke SHIGA
-
Patent number: 9952610Abstract: A semiconductor integrated circuit includes a control transistor, a control circuit, a reference circuit, a current source, and a stabilizing circuit including a first transistor whose base is connected to a node to receive the reference voltage. The reference circuit includes series-connected second transistor and first and second resistors, third and fourth transistors and third and fourth resistors, and fifth and sixth transistors. The fifth transistor has connected base and collector, which base is connected to a base of the third transistor, the second transistor has a base connected to a node between third and fourth transistors, fourth and sixth transistors have bases connected to a first node between first and second resistors or a second node between second transistor and first resistor, a potential at the first or second node is the reference voltage, and a gain is determined depending on a resistance of the first resistor.Type: GrantFiled: June 7, 2017Date of Patent: April 24, 2018Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Katsuhiro Yokoyama, Yoichi Takano
-
Publication number: 20180097439Abstract: A semiconductor integrated circuit for a regulator includes an opening error detecting circuit detecting an opened state of an output terminal; a short-circuiting error detecting circuit detecting a short-circuiting state thereof; a first output terminal outputting a result detected by the opening error detecting circuit to an external unit; a second output terminal outputting a result detected by the short-circuiting error detecting circuit thereto; and a thermal shutdown circuit detecting the temperature of a semiconductor substrate and turns off the voltage control transistor if the detected temperature of the semiconductor substrate exceeds a predetermined temperature. A signal indicating the logic sum of an output signal of the thermal shutdown circuit and that of the short-circuiting error detecting circuit is outputted from the second output terminal such that the output signal of the opening error detecting circuit is not blocked based on the output signal of the thermal shutdown circuit.Type: ApplicationFiled: September 29, 2017Publication date: April 5, 2018Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Shinichiro MAKI, Yoichi TAKANO, Katsuhiro YOKOYAMA
-
Patent number: 9785163Abstract: A regulator 100 is provided. The regulator 100 includes an output transistor M1 controlled by an output of an error amplifier circuit 104; a first MOS transistor M2 having a gate that is connected to a first terminal; a second MOS transistor M3, having a source that is connected to a second terminal 102, having a gate and a drain that are connected to a drain of the first MOS transistor M2; and a third MOS transistor M4, having a drain that is connected to a drain of the output transistor M1, having a gate that is connected to a gate of the second MOS transistor M3, and having a source that is connected to the second terminal 102. An output of the error amplifier circuit 104 is connected to a source of the first MOS transistor M2 via a signal processing circuit 110 or 210.Type: GrantFiled: November 16, 2016Date of Patent: October 10, 2017Assignee: MITSUMI ELECTRIC CO., LTD.Inventor: Yoichi Takano
-
Publication number: 20170199535Abstract: A regulator 100 is provided. The regulator 100 includes an output transistor M1 controlled by an output of an error amplifier circuit 104; a first MOS transistor M2 having a gate that is connected to a first terminal; a second MOS transistor M3, having a source that is connected to a second terminal 102, having a gate and a drain that are connected to a drain of the first MOS transistor M2; and a third MOS transistor M4, having a drain that is connected to a drain of the output transistor M1, having a gate that is connected to a gate of the second MOS transistor M3, and having a source that is connected to the second terminal 102. An output of the error amplifier circuit 104 is connected to a source of the first MOS transistor M2 via a signal processing circuit 110 or 210.Type: ApplicationFiled: November 16, 2016Publication date: July 13, 2017Applicant: MITSUMI ELECTRIC CO., LTD.Inventor: Yoichi TAKANO
-
Patent number: 9703305Abstract: A power circuit includes an input terminal to which an input voltage is applied; a control element which generates an output voltage obtained by regulating the input voltage; an output terminal from which the output voltage is output; a discharge circuit which discharges by extracting an electric charge from the control element on a side of the output terminal; a drive circuit which generates a drive current for causing the discharge circuit to operate using power of the control element on the side of the input terminal; a detection circuit which detects the output voltage; and a discharge control circuit which decreases a current value of the drive current to a current value enabling the discharge circuit to continuously operate in a case where the detection circuit detects that the output voltage reaches a setup voltage by an operation of the discharge circuit.Type: GrantFiled: December 21, 2015Date of Patent: July 11, 2017Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Kohei Sakurai, Yoichi Takano
-
Patent number: 9606556Abstract: A semiconductor integrated circuit for a regulator, including: a control transistor; a control circuit; and a discharge circuit, wherein the discharge circuit includes: a constant current source circuit; a reference voltage generating circuit; a voltage comparator circuit; and a current amplification circuit, and wherein the control circuit is configured to control the control transistor in response to the control signal, and the discharge circuit is configured to operate the discharge transistor by the amplified current amplified by the current amplification circuit.Type: GrantFiled: May 3, 2016Date of Patent: March 28, 2017Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Yoichi Takano, Katsuhiro Yokoyama
-
Publication number: 20170063232Abstract: A semiconductor integrated circuit for a regulator includes the following: a voltage controlling transistor; a controlling circuit; a first and second transistor; a first external terminal to connect a current voltage converting element; a first and second voltage comparing circuit which compares a converted voltage with a predetermined comparison voltage and determines which is large or small; and a first and second output terminal which externally outputs a result of comparison by the first and second voltage comparing circuit, respectively. When a current larger than a predetermined open-circuit abnormality detecting current value flows in the first transistor, output of the first voltage comparing circuit is inverted. When a current larger than a predetermined short-circuit abnormality detecting current value flows in the second transistor, output of the second voltage comparing circuit is inverted.Type: ApplicationFiled: August 17, 2016Publication date: March 2, 2017Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Yoichi TAKANO, Shinichiro MAKI
-
Publication number: 20160334817Abstract: A semiconductor integrated circuit for a regulator, including: a control transistor; a control circuit; and a discharge circuit, wherein the discharge circuit includes: a constant current source circuit; a reference voltage generating circuit; a voltage comparator circuit; and a current amplification circuit, and wherein the control circuit is configured to control the control transistor in response to the control signal, and the discharge circuit is configured to operate the discharge transistor by the amplified current amplified by the current amplification circuit.Type: ApplicationFiled: May 3, 2016Publication date: November 17, 2016Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Yoichi ` TAKANO, Katsuhiro YOKOYAMA