Murata Manufacturing Co., Ltd.

Takanori Tsuchiya

Hirokazu Yazaki

Keito Yonemori

Koji Kamada

Takashi Noma

Kazuya Kato

Hironori Sakai

A circuit module includes an interposer, and the interposer includes an element body including a first surface, a first interposer terminal provided on the first surface of the element body, and connected to a first external element, a second interposer terminal provided on the first surface of the element body, and connected to a second external element, a first wiring provided in the element body, and electrically connecting the first interposer terminal and the circuit board with each other, a second wiring provided in the element body, and electrically connecting the second interposer terminal and the circuit board with each other, and a bypass wiring provided in the element body and/or on a surface of the element body, and electrically connecting the first interposer terminal and the second interposer terminal with each other.

Circuit module and interposer

An interposer substrate includes a dielectric portion, a magnetic portion, and a first principal surface and a second principal surface opposite to each other. Connection terminal electrodes are each provided on a corresponding one of first principal surfaces of the dielectric portion and the magnetic portion, and are connected to a cable. Circuit-board terminal electrodes are provided on a second principal surface of the dielectric portion and connected to a circuit board. Wiring electrodes are provided inside a base body, and connecting the connection terminal electrodes to the circuit-board terminal electrodes in a predetermined connection pattern. The wiring electrodes include a first wiring electrode passing through only the dielectric portion, and a second wiring electrode passing through the magnetic portion.

Interposer substrate, circuit module, and interposer substrate manufacturing method

A noise reduction circuit is connected between at least one line of an input line and an output line of a DC-DC converter, a ground, and a ground terminal of a switching control IC included in the DC-DC converter. The noise reduction circuit includes a first capacitor connected between the at least one line and the ground terminal, a second capacitor connected between the at least one line and the ground, and an inductor connected between the ground terminal and the ground.

Noise reduction circuit and noise reduction element

An interposer substrate includes a body, first to third external connection conductors, and a wiring conductor. The body includes first to third principal surfaces. A distance between the first and second principal surfaces is different from a distance between the first and third principal surfaces. The first external connection conductor is provided on the first principal surface and is connected to an external circuit board. The second external connection conductor is provided on the second principal surface and is connected to a first flat cable. The third external connection conductor is provided on the third principal surface and is connected to a second flat cable. The wiring conductor is provided in the body, and connects the first external connection conductor and second and third external connection conductors.

Interposer substrate and circuit module

A power transmission device wirelessly transmits power to a power receiving device rectifying a voltage received and supplying the voltage to a load circuit. The power transmission device includes a power transmitter that makes capacitance or electromagnetic coupling to the power receiver and transmits electric power to the power receiver, a power supply unit that generates electric power to be transmitted to the power receiving device and supplies the electric power to the power transmitter, a load impedance detector that detects a load impedance of the power receiving device based on an electric signal detected in the power transmission device, and a controller that controls the electric power to be generated by the power supply unit such that an output voltage of the rectifying circuit of the power receiving device is equal to or lower than a predetermined voltage based on a detection result of the load impedance detector.

Power transmission system and power transmission device used for power transmission system

A power transmission system and a power receiving jacket is provided that enhances the transmission efficiency of electric power with a simple structure and without increasing manufacturing costs. The power transmission system includes a power transmitting device having a first passive electrode, a first active electrode whose potential is higher than the first passive electrode, and a voltage generation circuit connected between the first passive electrode and the first active electrode, a power receiving jacket having a second active electrode and a power receiving circuit module connected to the second active electrode, and an electronic device attachable to the power receiving jacket. The electronic device includes a chassis having a conductive portion formed from a conductive material along a surface facing the first passive electrode, and the power receiving circuit module is electrically connected between the conductive portion and the second active electrode.

Growing community of inventors

Nagaokakyo, Japan

Takanori Tsuchiya