Fujitsu Corporation

Ryoji Yamada

Yasuhiro Yamashita

Makoto Suwada

Masaki Tosaka

Shogo Fujimori

Kazuhiko Tokuda

Jiro Yoneda

Tatsuo Koizumi

Kazuyuki Iida

Yoshiyuki Iwakura

Hiroshi Miura

Kazunari Gotou

Masaharu Nishimura

Yumiko Katsuyama

A noise countermeasure determination method includes the step of obtaining an analyzing circuit judgement result by judging acceptability of the analyzing circuit based on a comparison of features of the analyzing circuit and transmission circuit topologies, and outputting an improvement proposal for making the analyzing circuit closer to one of basic types of the transmission circuit topologies depending on the analyzing circuit judgement result.

Noise countermeasure determination method and apparatus and storage medium

A noise countermeasure determination method includes the steps of calculating recommended circuit information considered to minimize a noise by use of at least one formula, based on input circuit information amounting to at least one net of a target circuit which is to be subjected to a noise analysis, and comparing the input circuit information and the recommended circuit information, and determining a differing portion of the recommended circuit information differing from the input circuit information, as noise countermeasures.

A noise analyzing method analyzes a crosstalk noise based on circuit data in which buses having the same signal transmitting direction and buses having opposite signal transmitting directions are distinguished from each other, by analyzing the crosstalk noise only for the same signal transmitting direction with respect to the buses having the same signal transmitting direction.

Noise analyzing method and apparatus and storage medium

A wiring device and wiring method suitable for designing LSIs or printed boards or the like. The wiring device includes a wiring pattern editing unit for editing wiring patterns; a noise analyzing unit for analyzing a noise occurring when a circuit is operated according to the wiring patterns edited by the wiring editing unit; and a noise occurring spot specifying unit for specifying a spot when noise occurs in the wiring pattern, based on the solution analyzed by the noise analyzing unit and the wiring pattern edited in the wiring pattern editing unit The man-hours of an operator can be reduced by interlocking the crosstalk noise analysis with the wiring pattern editing function and then by reducing the number of man-hours needed to correct a wiring pattern by an operator.

Wiring device and wiring method

A wiring CAD apparatus wherein a situation of a noticed event can be identified at a moment on a screen. The wiring CAD apparatus comprises a searching timing detection section for detecting a new displaying processing/deletion processing timing as a searching timing for a non-wired pin, a non-wired pin searching section operable in response to the searching timing detected by said searching timing detection section for searching the non-wired pin, and a display data production section for producing display data in accordance with which the non-wired pin searched out by said non-wired pin searching section is to be displayed on a display section in a visually distinguishable condition from another already wired part pin. The display data produced by said display data production section is displayed on the display section under the control of a displaying control section. The wiring CAD apparatus can be applied to a CAD system with which wiring designing for an LSI, an MCM, a PWB or the like can be performed interactively.

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Kawasaki, Japan

Ryoji Yamada