Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Shoichi Mimura

Hirotsugu Fusayasu

Seiji Hamada

Miyoko Irikiin

Hiroto Inoue

Seiji c/o Matsushita Iproc Ip Dev Center Hamada

Miyoko c/o Matsushita Iproc Ip Dev Cent Irikiin

A checking unit includes a power net extractor for extracting a power net with power attribution, which is segmented by a power-decoupling element, with reference to circuit design data of a printed wiring board; a parts number extractor for extracting a parts number of an integrated circuit connected to the extracted power net; a parts headcount calculator for calculating a headcount of the extracted parts; a judging unit for comparing the extracted parts headcount with a predetermined reference value; and a representing unit for representing a name of the power net and the parts number of the integrated circuit as an unprocessed location of power decoupling when the headcount is larger than the reference value, thereby inspecting quickly whether a power supply in use, shared by each of the integrated circuits, is decoupled at higher frequencies by the power-decoupling element.

System and method for checking decoupling of power supply in printed wiring board

A management information display unit that is able to form management information for managing the power supply state of fuel cells and displays the management information while allowing the management information to be identified as to which electronic device pertains to the management information based on identification information inputted from a plurality of electronic devices that are able to output the formed management information in correlation with the identification information of the fuel cell, and an information transmitting part for transmitting the identification information and the management information while allowing the information to be inputted to the management information display unit are provided.

Fuel cell management system and audio system provided with the management system

A printed wiring board design method including the steps of designing placement and wiring for circuit components based on circuit information on a mounting surface of the board; excluding a placement region and a wiring region for the circuit components from the mounting surface to thereby calculate a placement and wiring enable region for an EMC component in which the EMC component can be placed and wiring can be laid down; and calculating the placement and wiring range for the EMC component based on an EMC design rule from the calculated placement and wiring enable region for the EMC component. Thus, a printed wiring board design method is provided in which placement of and wiring for a new bypass capacitor or the like can be implemented and a region satisfying restraint items from the design rule can be clearly displayed as a new input enable region on a CAD screen.

Printed wiring board design method, program therefor, recording medium storing the program recorded therein, printed wiring board design device using them and CAD system

A CAD apparatus designing patterns of a printed board. The apparatus includes a signal wiring pattern detecting unit for detecting a signal wiring pattern, and a guard ground detecting unit for tracing the signal wiring pattern along the longitudinal direction thereof, in order to detect whether or not a guard ground exists within a distance from the signal wiring pattern to a predetermined first discriminant value, identify a non-guard ground section within the distance to the first discriminant value, and to detect whether or not a guard ground exists within another distance from the signal wiring pattern to a second discriminant value, which is larger than the first discriminant value. The apparatus also includes a return path judging unit for judging an error of guard ground when no guard ground exists within the distance to the second discriminant value, thereby quickly checking a return path without mistake.

Method for checking return path of printed and CAD apparatus for designing patterns of printed board

An element placement check system for checking element placement on a printed wiring board having wiring by which a power supply terminal of an integrated circuit and a power supply decoupling element for the power supply terminal are connected on a mounting surface on which the integrated circuit is mounted, wherein the wiring is connected to a power supply plane for providing a direct current power supply to the power supply terminal through a power supply via hole, including: element distance detecting means detecting a first wire length between the power supply decoupling element and the power supply terminal; power supply via hole distance detecting means detecting a second wire length between the power supply via hole and the power supply terminal; and determination means determining a positional relationship of the power supply decoupling element and the power supply via hole to the power supply terminal based on the first and second wire lengths, thereby providing a check system and a printed wiring board design system capable of checking a connection sequence of a power supply decoupling element such as a bypass capacitor and the power supply via hole connected to the power supply plane feeding a direct current power supply to the power supply terminal as viewed from the power supply terminal of an integrated circuit.

Growing community of inventors

Hirakata, Japan

Shoichi Mimura