Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Masakazu Adachi

Susumu Kobayashi

Tadayoshi Nakatsuka

Takuya Masuda

Keisuke Muto

Maiya Sanuki

Toshio Ishizaki

Kazuhide Uriu

Fumikazu Kurihara

Yoshihiko Tokunaga

Atsushi Suwa

Motoo Nakagawa

An energy planning system that proposes an appropriate energy plan for a home includes: a sensor that senses a state of an energy facility in a home; a predictor that predicts a future lifestyle of a resident of the home; and a proposer that determines information about an energy plan for the home based on a result of the sensing by the sensor and the lifestyle predicted by the predictor, and outputs the information.

Energy planning system and energy planning method considering a timing of a change in a total number of residents in a home

Electric power conversion device has first and second operation modes. First operation mode is of converting DC power from a first terminal into DC power having a desired voltage to be output to second terminal. Second operation mode is of converting DC power from the second terminal into DC power having a desired voltage to be output to first terminal. Switching section is configured to, in first operation mode, be turned on to cause short-circuiting between both ends of capacitor of rectifying circuit, and, in second operation mode, be turned off. First conversion part is configured to, in first operation mode, supply DC power-from first terminal, from first winding to second conversion part through a conversion circuit, and, in second operation mode, output to first terminal a voltage obtained by adding an output voltage of rectifying circuit to an output voltage of conversion circuit.

Electric power conversion device

A switching circuit is configured to switch on/off a current that flows through a resonance circuit constituted by a primary winding of a transformer, a capacitance element, and an inductor that are connected in series. Electric power that is induced in a secondary winding of the transformer is rectified by a rectifier circuit. A switch is connected in parallel with the capacitance element. A control unit is configured to control the switching circuit and the switch. The control unit is configured to select a first operation in which an operation frequency of the switching circuit is controlled by switching off the switch, and select a second operation in which a period during which a current flows from the switching circuit to the primary winding of the transformer is controlled by switching on the switch.

A common terminalis connected to drains of FETsandvia a capacitorFETstoare serially connected, and inserted between a source of the FETand a terminalvia a capacitorSimilarly, each of: FETstoFETstoFETstoFETstoand FETstois inserted between the source of the FETor an FETand a corresponding one of terminalstoThis configuration allows a stray capacitance value of a transmission/reception path to be reduced at the time of transmission/reception, thereby obtaining a favorable radio-frequency characteristic.

Radio-frequency switching circuit and semiconductor device

A high-frequency switching apparatus is composed of a transfer circuit unit including a plurality of FETs, and a shunt circuit unit including a plurality of FETs, as well. An electromagnetic wave absorption material element is connected to an end of the shunt circuit unit. To a connection point between the shunt circuit unit and the electromagnetic wave absorption material element, an external voltage terminal for fixing a potential at the point is connected. By this, a high-frequency switching apparatus is obtained which is excellent in isolation characteristics and is hard to break down even when a signal of a high voltage, such as an electrostatic surge, flows into the apparatus.

High-frequency switching apparatus

To realize high pressure-tightness and improvement in a high-frequency characteristic due to a low impedance between a shunt FET and a ground of a FET switch circuit. An antenna switch module comprising a switch circuit for switching between transmitting and receiving of a signal between an antenna and a transmitting portion and/or a receiving portion and having a shunt circuit, wherein a capacitor of the shunt circuit of the switch circuit is provided to a dielectric layered body, and remaining elements of the switch circuit are provided to semiconductor chips mounted on the dielectric layered body.

Growing community of inventors

Osaka, Japan

Masakazu Adachi