Patents by Inventor Tatsuya Hosotani

Tatsuya Hosotani 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).

  • Patent number: 11916485
    Abstract: A power supply system includes a plurality of power conversion circuits, each including an inductor and switching elements. A load distribution controller amplifies an inductor current signal input to a current signal terminal, outputs the amplified signal to a common node terminal, and generates an individual feedback signal to be output to a feedback signal adjustment terminal according to an inductor current signal and a voltage of the common node terminal. A switching control circuit controls the switching elements according to the individual feedback signal input to a feedback terminal.
    Type: Grant
    Filed: January 6, 2022
    Date of Patent: February 27, 2024
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya Hosotani
  • Patent number: 11916484
    Abstract: Each of a plurality of power conversion units includes an inductor, a switching circuit, and an individual analog controller. An MPU is capable of performing programmable arithmetic processing and outputs oscillation control signals to the plurality of power conversion circuits. Output parts of the plurality of power conversion units are connected to a common output terminal in a parallel manner, and the common output terminal is connected to a load. The individual analog controller is formed of an analog electronic circuit and includes a feedback signal generating part and a driving part. The feedback signal generating part detects the state of the output part of the power conversion unit and generates a feedback signal to be fed back to the power conversion unit. The driving part drives a switching element of the switching circuit.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: February 27, 2024
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya Hosotani
  • Patent number: 11909310
    Abstract: A switching power supply device includes a power conversion circuit that is provided at a multilayer printed board and includes a plurality of switching circuits and a controller controlling the switching circuits, windings configuring an inductor at the multilayer printed board, and a magnetic sheet on one or both of upper and lower faces of the multilayer printed board. First ends of the windings are connected to the switching circuits, and second ends of the windings are connected to a common output. The controller controls the plurality of switching circuits to periodically vary a position and a time at which magnetic flux generated by current flowing to the windings reaches the maximum magnetic flux density. Thus, the switching power supply device is thin, achieves dispersion of heat generation, handles variations in the magnitude of electric power by varying the area of the board, and effectively reduces unwanted radiation.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: February 20, 2024
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya Hosotani
  • Patent number: 11907785
    Abstract: An electronic card with electronic function circuit includes a communication antenna for short-range wireless communication, a wireless communication IC electrically coupled to the communication antenna, a receiving coil, a resonant capacitor forming a receiving resonant circuit together with the receiving coil, a rectifying and smoothing circuit coupled to the receiving resonant circuit, receiving display elements, a power control unit that controls power from the receiving resonant circuit, and an electronic function circuit that operates by using the power from the receiving resonant circuit. In response to the receiving coil receiving the power, the power control circuit indicates a power receiving state to a user by driving the receiving display elements.
    Type: Grant
    Filed: December 2, 2022
    Date of Patent: February 20, 2024
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya Hosotani
  • Patent number: 11855541
    Abstract: A plurality of power conversion units each include an inductor, a switching circuit, and a PWM control IC. An MPU outputs control signals to the plurality of power conversion units. Output parts of the plurality of power conversion units are connected to an output terminal in a parallel manner. Operating number signal generating circuits of feedback signal generating circuits generate an operating number signal Sop on the basis of individual current signals based on inductor currents in the plurality of power conversion units, and output the operating number signal to the MPU. The MPU sets operations of the plurality of power conversion units on the basis of the operating number signal, and outputs the control signals including the settings of the operations of the power conversion units.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: December 26, 2023
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Norikazu Sakamoto, Tatsuya Hosotani
  • Publication number: 20230361683
    Abstract: A power supply system apparatus includes a plurality of power conversion circuits and an MPU. The MPU outputs oscillation control signals to the plurality of power conversion circuits. Each of the plurality of power conversion circuits includes a pulse width modulation control circuit formed of an analog electronic circuit. For example, the power conversion circuit drives switching elements on the basis of a feedback signal obtained by detecting an output voltage of a common output terminal. An integrated system controller including the MPU and the plurality of power conversion circuits includes a plurality of individual voltage feedback control loops for individually controlling the plurality of power conversion circuits on the basis of feedback signals and supplies power to a load, while the plurality of power conversion circuits performing driving control using the individual voltage feedback control loops at the same time.
    Type: Application
    Filed: July 17, 2023
    Publication date: November 9, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya HOSOTANI
  • Publication number: 20230327546
    Abstract: A switching power supply device includes power supply input lines, DC output lines, a DC-DC converter circuit, and a noise reduction circuit. The noise reduction circuit includes a first half-bridge capacitor circuit that is connected between the power supply input lines, a second half-bridge capacitor circuit that is connected between the DC output lines, a first common mode choke coil, and an electrical path. The electrical path electrically connects a midpoint of the first half-bridge capacitor circuit to a midpoint of the second half-bridge capacitor circuit.
    Type: Application
    Filed: June 14, 2023
    Publication date: October 12, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Tatsuya HOSOTANI, Hiroyuki TAKATSUJI, Yuki ISHIKURA
  • Publication number: 20230327539
    Abstract: A switching power supply device includes an inverter circuit and a noise reduction circuit. The noise reduction circuit includes a first half-bridge capacitor circuit coupled to the DC input line, a second half-bridge capacitor circuit coupled to the AC output line, a first common-mode choke coil coupled between the first half-bridge capacitor circuit and the second half-bridge capacitor circuit, and an electrical path that electrically couples a middle point of the first half-bridge capacitor circuit with a middle point of the second half-bridge capacitor circuit.
    Type: Application
    Filed: June 14, 2023
    Publication date: October 12, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Yuki ISHIKURA, Hiroyuki TAKATSUJI, Tatsuya HOSOTANI
  • Publication number: 20230327545
    Abstract: A power factor correction switching power supply device includes a power factor correction circuit connected to an alternating-current input line, a first half-bridge capacitor circuit connected between lines of the AC input line, a second half-bridge capacitor circuit connected between lines of a direct-current output line that is closer to a load than a first output capacitor, a common mode choke coil disposed between the first output capacitor and the second half-bridge capacitor circuit, and an electric path configured to electrically connect a midpoint of the first half-bridge capacitor circuit and a midpoint of the second half-bridge capacitor circuit to form a noise balancing circuit. The noise balancing circuit has a potential different from a potential of a ground and is configured to balance common mode noise.
    Type: Application
    Filed: June 13, 2023
    Publication date: October 12, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki TAKATSUJI, Tatsuya HOSOTANI, Yuki ISHIKURA
  • Publication number: 20230308022
    Abstract: A switching power-supply unit includes a power conversion circuit, a control circuit, a common-mode choke coil, and half-bridge capacitors. The common-mode choke coil is connected to the control circuit on its side of a direct-current power supply. The half-bridge capacitor is connected to the power conversion circuit on its side of a direct-current power supply, and is connected to the control circuit on its side of the direct-current power supply. A midway point of the half-bridge capacitor is electrically connected to a midway point of the half-bridge capacitor. A noise balancing circuit is configured as a closed circuit including the power conversion circuit, the control circuit, the half-bridge capacitors, and the common-mode choke coil, and causes common-mode currents to be confined and canceled out each other. The common-mode currents are switching noise generated in multiple parts of the closed circuit due to a switching operation of power-conversion switching devices.
    Type: Application
    Filed: March 22, 2023
    Publication date: September 28, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki TAKATSUJI, Tatsuya HOSOTANI
  • Publication number: 20230308023
    Abstract: A switching power-supply unit includes a power conversion circuit, a control circuit, a class-Y capacitor, and a common-mode choke coil. The control circuit has a direct electrical connection to the power conversion circuit. The class-Y capacitor is connected to the power conversion circuit on its side of a direct-current power supply, and is connected to the ground potential. The common-mode choke coil is connected to the control circuit on its side of a direct-current power supply. A noise balancing circuit is formed of a closed circuit including the power conversion circuit, the control circuit, the class-Y capacitor, and the common-mode choke coil. The noise balancing circuit causes common-mode currents to be confined and canceled out each other. The common-mode currents serve as switching noise generated in multiple parts of the closed circuit due to a switching operation of power-conversion switching devices.
    Type: Application
    Filed: March 22, 2023
    Publication date: September 28, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki TAKATSUJI, Tatsuya HOSOTANI
  • Publication number: 20230280813
    Abstract: An electronic card includes an electric storage device, a charging circuit, a wireless communication circuit, a processor, an electronic function circuit, a power management circuit, and a wakeup circuit configured to start the power management circuit upon receiving an external trigger. The power management circuit supplies, after being started by the wakeup circuit, power of the electric storage device to the processor and the electronic function circuit. The processor stores, before the start of wireless communication, an operation state or an output result of the electronic function circuit which is obtained by an operation with power of the electric storage device, and causes, after operation processing of the electronic function circuit, the wireless communication circuit to start the wireless communication.
    Type: Application
    Filed: May 10, 2023
    Publication date: September 7, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Tatsuya HOSOTANI, Kiyokazu YAMADA
  • Publication number: 20230275465
    Abstract: A wireless power reception circuit system includes a wireless power reception circuit, an electric storage device, a load unit, a digital control circuit, a voltage conversion circuit, a DC-DC converter, smoothing capacitors, a voltage OR circuit, and an external signal setting circuit for resetting the digital control circuit. An enable signal input terminal of the voltage conversion circuit is in a disabled state when the voltage conversion circuit is not controlled by the digital control circuit. The digital control circuit supplies an enable signal to the enable signal input terminal of the voltage conversion circuit when operating the voltage conversion circuit.
    Type: Application
    Filed: May 2, 2023
    Publication date: August 31, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Norikazu SAKAMOTO, Tatsuya HOSOTANI
  • Publication number: 20230276573
    Abstract: A circuit module includes a circuit module substrate having an area smaller than a large-scale circuit board, an electronic circuit component mounted on the circuit module substrate, a connection pin provided to the circuit module substrate, and a circuit-module-substrate-side fitting structure part provided to the circuit module substrate. A pin receptacle and the connection pin are electrically connected to each other. A non-conductive thermal adhesive layer is formed between a surface of the circuit module substrate and a surface of a base material of the large-scale circuit board facing to each other, the non-conductive thermal adhesive layer electrically insulating and thermally joining the surfaces by a non-conductive thermally conductive material.
    Type: Application
    Filed: May 5, 2023
    Publication date: August 31, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Osamu MIKI, Tatsuya HOSOTANI
  • Publication number: 20230268776
    Abstract: An electronic card of a wireless communication charging circuit system includes a power reception coil, a power reception circuit, a power storage device, a charging circuit, a voltage conversion circuit that is connected to the power storage device and generates a prescribed power supply voltage, a communication antenna , a communication circuit that performs communication using output power of the voltage conversion circuit, and a control circuit that controls the voltage conversion circuit and the charging circuit. The control circuit sets a power path in a communication period so that the communication circuit performs communication and power used by a microcontroller is supplied from the power storage device, and sets a power path in a charging period so that a reader-writer device, which was made to recognize the communication circuit, generates a magnetic field and power used by the microcontroller is supplied from the power reception circuit.
    Type: Application
    Filed: May 2, 2023
    Publication date: August 24, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Takahiro NAGAI, Tatsuya HOSOTANI
  • Publication number: 20230268774
    Abstract: A magnetic coupling coefficient between a power reception coil and a communication antenna is 0.3 or less. A power management circuit suppresses electromagnetic interference between the power reception coil and the communication antenna in a predetermined time period by causing a rectification stopping circuit to operate to keep the rectification stopping circuit in an operation state in the predetermined time period with a received power voltage exceeding a first threshold value and by changing a resonant frequency of a power reception resonant circuit to a frequency different from a frequency being used in a wireless communication circuit to keep the resonant frequency in a changed state.
    Type: Application
    Filed: April 26, 2023
    Publication date: August 24, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Koyo KAIWA, Tatsuya HOSOTANI, Takahiro NAGAI
  • Publication number: 20230147880
    Abstract: A wireless power transmission apparatus includes a power transmission resonance mechanism including a wireless power transmission coil and a power transmission resonance capacitor; a power transmission circuit that performs switching of the power transmission resonance mechanism at a predetermined switching frequency; a voltage conversion circuit that performs voltage conversion on an input power supply voltage; an intermediate capacitor between the voltage conversion circuit and the power transmission circuit and shared between the voltage conversion circuit and the power transmission circuit; an intermediate input current detection circuit that detects an intermediate input current input to the power transmission circuit from the voltage conversion circuit; and an electric power management circuit that, by setting an upper limit value for the intermediate input current and controlling an output voltage of the voltage conversion circuit, adjusts the amplitude of a DC voltage or current intermittently provide
    Type: Application
    Filed: December 16, 2022
    Publication date: May 11, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya HOSOTANI
  • Publication number: 20230128671
    Abstract: A wireless power transfer system comprises a power transmission device and a power reception device. The power reception device includes a power reception coil that wirelessly magnetically couples with a power transmission coil included in the power transmission device. The power transmission device includes a switching circuit in which switch elements perform switching operations, an input voltage adjustment circuit that is electrically connected to the switching circuit and adjusts an input voltage, and an MPU. The MPU is configured to recognize a power requirement presented by the power reception device, control the input voltage adjustment circuit and control intermittent oscillation of the switching circuit, and adjust the input voltage to prevent an oscillation stop period of the intermittent oscillation from exceeding a predetermined stop period.
    Type: Application
    Filed: December 19, 2022
    Publication date: April 27, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Norikazu SAKAMOTO, Tatsuya HOSOTANI
  • Patent number: 11637460
    Abstract: A wireless power transfer system includes a power transmitter including a high frequency power converter circuit that converts a direct current power into a high frequency power using a switching circuit, a power transmitter coil, and an electric field shield member close to the power transmitter coil and having a structure that uses a conductive member to form an equivalent capacitance between the electric field shield member and the power transmitter coil by electric coupling therebetween during a power transmitting operation such that the value of the equivalent capacitance becomes greater than the value of an equivalent capacitance formed between the power transmitter coil and ground. The power transmitter causes electric potentials in the electric field shield member to be identical using the conductive member, suppresses changes in an electric field in a vicinity of the power transmitter coil, and suppresses radiation of the electric field noise.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: April 25, 2023
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takahiro Nagai, Tatsuya Hosotani
  • Publication number: 20230124799
    Abstract: A wireless power transfer system includes a power transmission circuit that includes power transmission resonance mechanisms including power transmission coils and power transmission resonant capacitors, and a power reception circuit that includes a power reception resonance mechanism including a power reception coil that magnetically couples to the power transmission coils and a power reception resonant capacitor. The power transmission circuit includes a square wave power supply circuit including a direct-current power supply and a switching circuit, the power transmission resonance mechanisms and the power reception resonance mechanism form electromagnetic resonance coupling, and the power reception resonance mechanism acquires reception power by superposing resonance currents induced by the electromagnetic resonance coupling.
    Type: Application
    Filed: December 19, 2022
    Publication date: April 20, 2023
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Osamu MIKI, Tatsuya HOSOTANI