Patents by Inventor Takami MUTO
Takami MUTO 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).
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Publication number: 20230282569Abstract: A power supply circuit module includes a power supply circuit including a lower substrate, an upper substrate parallel or substantially parallel to the lower substrate, an inductor, and chip components mounted on the lower substrate, switching circuit components and chip components mounted on the upper substrate, and substrate connectors that connect the lower substrate with the upper substrate electrically and mechanically. A portion of the substrate connectors is an inductor configuring portion of the power supply circuit or a portion of an inductor configuring portion of the power supply circuit.Type: ApplicationFiled: April 6, 2023Publication date: September 7, 2023Inventors: Takami MUTO, Tsutomu ISHIGE, Takanari OKADA, Hiroki MINAMI, Munetake MIYASHITA
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Patent number: 11728727Abstract: A charge pump includes a first-stage switch, intermediate-stage switches, and a final-stage switch sequentially connected in series to a power line from an input terminal side. A snubber circuit is connected to the intermediate-stage switch. The snubber circuit includes a capacitor and first and second diodes. The capacitor is connected in series to the first diode and the series circuit of the capacitor and the first diode is connected in parallel to the intermediate-stage switch. The cathode of the second diode is connected to a node between the capacitor and the first diode and the anode of the second diode is connected to output terminal.Type: GrantFiled: May 18, 2022Date of Patent: August 15, 2023Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Takami Muto
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Publication number: 20220393580Abstract: A charge pump includes a first-stage switch, intermediate-stage switches, and a final-stage switch sequentially connected in series to a power line from an input terminal side. A snubber circuit is connected to the intermediate-stage switch. The snubber circuit includes a capacitor and first and second diodes. The capacitor is connected in series to the first diode and the series circuit of the capacitor and the first diode is connected in parallel to the intermediate-stage switch. The cathode of the second diode is connected to a node between the capacitor and the first diode and the anode of the second diode is connected to output terminal.Type: ApplicationFiled: May 18, 2022Publication date: December 8, 2022Inventor: Takami MUTO
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Patent number: 10530244Abstract: A switch circuit includes a first switch element defined by an FET, and an active snubber circuit connected between a drain and a source of the first switch element and including a second switch element defined by an FET, a capacitor connected in series to the second switch element, a third switch element connected to a gate of the second switch element and turned on to extract an electric charge of capacitance between the gate and a source of the second switch element, and a delay circuit that turns on the third switch element at a timing delayed from a timing at which the second switch element is turned on.Type: GrantFiled: October 3, 2018Date of Patent: January 7, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takami Muto, Takayoshi Nishiyama
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Patent number: 10497631Abstract: An insulated DC-DC converter includes a substrate, a transformer, a primary side electronic component and a primary side wire defining a primary side circuit together with a primary winding, a secondary side electronic component and a secondary side wire defining a secondary side circuit insulated from the primary side circuit, together with a secondary winding, the secondary side electronic component including a choke coil, and an inter-circuit electronic component and an inter-primary side circuit wire connected over the primary side circuit and the secondary side circuit while insulating the primary side circuit and the secondary side circuit from each other in a DC manner.Type: GrantFiled: January 22, 2018Date of Patent: December 3, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takami Muto, Takayuki Yamamoto, Takayoshi Nishiyama, Naoto Kinoshita, Yuki Abura, Yoshihiro Matsumoto
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Patent number: 10348213Abstract: A DC-DC converter includes a voltage input portion that receives a DC voltage, a voltage output portion to which a load is connected, a transformer that includes at least a primary winding and a secondary winding, a main switch element between the voltage input portion and the primary winding of the transformer, a rectifier circuit between the voltage output portion and the secondary winding of the transformer, and a reset voltage suppressing circuit that detects a magnitude of a reset voltage generated when excitation energy accumulated in the transformer is reset and reduces a voltage which is applied to the main switch element when the magnitude of the reset voltage exceeds, for example, a predetermined threshold value.Type: GrantFiled: October 2, 2018Date of Patent: July 9, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takami Muto, Takayoshi Nishiyama
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Publication number: 20190044450Abstract: A DC-DC converter includes a voltage input portion that receives a DC voltage, a voltage output portion to which a load is connected, a transformer that includes at least a primary winding and a secondary winding, a main switch element between the voltage input portion and the primary winding of the transformer, a rectifier circuit between the voltage output portion and the secondary winding of the transformer, and a reset voltage suppressing circuit that detects a magnitude of a reset voltage generated when excitation energy accumulated in the transformer is reset and reduces a voltage which is applied to the main switch element when the magnitude of the reset voltage exceeds, for example, a predetermined threshold value.Type: ApplicationFiled: October 2, 2018Publication date: February 7, 2019Inventors: Takami MUTO, Takayoshi NISHIYAMA
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Publication number: 20190036445Abstract: A switch circuit includes a first switch element defined by an FET, and an active snubber circuit connected between a drain and a source of the first switch element and including a second switch element defined by an FET, a capacitor connected in series to the second switch element, a third switch element connected to a gate of the second switch element and turned on to extract an electric charge of capacitance between the gate and a source of the second switch element, and a delay circuit that turns on the third switch element at a timing delayed from a timing at which the second switch element is turned on.Type: ApplicationFiled: October 3, 2018Publication date: January 31, 2019Inventors: Takami MUTO, Takayoshi NISHIYAMA
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Publication number: 20180145598Abstract: An insulated DC-DC converter includes a substrate, a transformer, a primary side electronic component and a primary side wire defining a primary side circuit together with a primary winding, a secondary side electronic component and a secondary side wire defining a secondary side circuit insulated from the primary side circuit, together with a secondary winding, the secondary side electronic component including a choke coil, and an inter-circuit electronic component and an inter-primary side circuit wire connected over the primary side circuit and the secondary side circuit while insulating the primary side circuit and the secondary side circuit from each other in a DC manner.Type: ApplicationFiled: January 22, 2018Publication date: May 24, 2018Inventors: Takami MUTO, Takayuki YAMAMOTO, Takayoshi NISHIYAMA, Naoto KINOSHITA, Yuki ABURA, Yoshihiro MATSUMOTO
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Patent number: 9748851Abstract: A switching power supply apparatus includes a first series circuit including a third rectifier device and a fourth rectifier device and that is connected between a positive output terminal and a negative output terminal, and a first capacitor a first end of which is connected to a connection node between the third rectifier device and the fourth rectifier device and a second end of which is connected to an end, not connected to the first series circuit, of a first rectifier device or a second rectifier device. The first series circuit and the first capacitor define a snubber circuit.Type: GrantFiled: October 13, 2015Date of Patent: August 29, 2017Assignee: Murata Manufacturing Co., Ltd.Inventors: Takami Muto, Tadahiko Matsumoto
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Publication number: 20160036337Abstract: A switching power supply apparatus includes a first series circuit including a third rectifier device and a fourth rectifier device and that is connected between a positive output terminal and a negative output terminal, and a first capacitor a first end of which is connected to a connection node between the third rectifier device and the fourth rectifier device and a second end of which is connected to an end, not connected to the first series circuit, of a first rectifier device or a second rectifier device. The first series circuit and the first capacitor define a snubber circuit.Type: ApplicationFiled: October 13, 2015Publication date: February 4, 2016Inventors: Takami MUTO, Tadahiko MATSUMOTO