Canon Kabushiki Kaisha

Toru Osaka

Hideho Inagawa

Toru Otaki

Yasushi Takeuchi

Makoto Takayama

Yoshimi Terayama

Tatsuo Nishino

Tomoyasu Arakawa

A shielded cable with a connector, in which the connector is connected to an end portion of the shielded cable formed by covering a plurality of cores with a shielding member, comprises an electrode portion provided with a plurality of electrodes connected to the cores, a conductive inner housing having a fitting portion for fitting to a connector which is to be fitted to the connector, and having the electrode portion therein, and a conductive outer housing which is used in combination with the inner housing and contains cores exposed from the shielded cable, wherein the outer housing is electrically connected to the shielding member, and the outer housing is electrically connected to the inner housing through a conductive connecting portion electrically connected to the fitting portion of the inner housing.

Shielded cable with connector

A printed wiring board having assembled thereon a grid array type package, a multi-terminal device with many terminals arranged in matrix, is provided, through first signal connection holes, signal lines, and second connection holes, with many numbers of lands divided into plural blocks, being arranged in matrix on a first layer to connect each terminal of the multi-terminal device correspondingly, signal line patterns connected with many lands, and drawn out in the same direction per block, and first signal patterns from lands positioned on the innermost line of many lands. Then, the wiring patterns of the signal lines are drawn out regularly from many lands formed in matrix on the assembling surface of the grid array type package to make it easier for the printed wiring board to effectuate wiring connections without making them complicated or increasing the number of layers of the printed wiring board. Also, with the provision of ground patterns that surround signal lines, it is made possible to reduce unwanted radiant, as well as to suppress the occurrence of malfunctions of electronic equipment due to reflections and ground bounces.

Printed-wiring board

A printed circuit board capable of suppressing radiation noise efficiently includes a first conductive layer where a plurality of power lines are provided at predetermined spacing along one direction, a second conductive layer where a plurality of power lines are provided at predetermined spacing along a direction orthogonal to the one direction, and a plurality of plated through holes for connecting the power lines on the first conductive layer and the power lines on the second conductive layer at the overlapping points of those lines. The power lines contain thin lines and thick lines spaced between a plurality of the thin lines. The predetermined spacing is determined based on a rising time or falling time of the output signal of the IC to be mounted on the circuit board.

Printed circuit board

Growing community of inventors

Kanagawa, Japan

Toru Osaka