Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Mamoru Ito

Hiroyuki Maeshima

Yasunobu Tsukio

Yukinori Sasaki

Yoshinori Takamuku

Hiroki Moriwake

Yasuhiro Kobatake

Yoji Masuda

Nobuya Takagi

Yoichi Aoshima

Toshio Tsuji

A designing method for designing an electronic component aiming at increase in designing efficiency is provided. The designing method has a step of setting a predetermined electrical characteristic, a step of determining an electric constant of the component with a first electric circuit simulation to satisfy the predetermined electrical characteristic, a step of determining a pattern shape for obtaining the electric constant, a step of retrieving and selecting an electronic component matching with the electric constant from a database, and performing layout design using the selected electronic component as a module, a step of performing a second electric circuit simulation, and a step of determining whether the electrical characteristic of the module matches with the predetermined electrical characteristic.

Designing method for designing electronic component

When an electrolytic solution of an electric double layer capacitor is prepared, an association is assumed as a model of a solute dissolved in a solvent. The energy of the association and the energies of the reduced association and oxidized association are calculated and a withstand voltage is estimated based thereon. If the withstand voltage exceeds the target value, only the estimated electrolytic solution is actually prepared. As a result, the development time in the development of electrolytic solution is greatly shortened.

Method for selecting electrolytic solution for electric double layer capacitor

A mobile receiver apparatus is provided where its antenna directivity is controllably determined for improving the response to a desired signal as it moves and its surrounding geographical features and thus its environment for signal reception are varied. The mobile receiver apparatus comprises a directivity variable antenna, an antenna controller connected with the directivity variable antenna for conducting a control action to align the directivity with a desired direction, and an optimum directivity calculator connected with the antenna controller for calculating from the current position of a mobile and its surrounding geographical features an optimum pattern of the directivity.

Mobile receiver

A method of deriving an equivalent circuit model for a passive component includes a first step of providing a given frequency characteristic of a capacitor, a second step of forming one of an RC circuit, an RL circuit, and an RCL circuit using frequency-independent resistances (R), capacitances (C) and/or inductances (L), as the equivalent circuit model representing a circuit capable of performing a simulation in a time domain, a third step of composing an evaluation function for evaluating accuracy of the equivalent circuit model formed in the second step, and a fourth step of determining values of the circuit components by minimizing the evaluation function composed in the third step. The method with a simulator adapted for implementing this method and a computer-readable storage medium containing a recorded program, derives the equivalent circuit model for a capacitor. The model is capable of performing a simulation in the time domain using a common procedure not dependent upon types of passive components.

Method for making equivalent circuit model of passive element, simulator, and storage medium

Secure encrypted data communication system having physically secure IC

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Hyogo, Japan

Mamoru Ito