Hitachi, Ltd.

Hitachi Microcomputer System, Ltd.

Yuzuru Fujita

Bunichi Fujita

Seiichi Kawashima

Noboru Masuda

Haruhiko Imada

Sakoh Ishikawa

A method and an apparatus for enabling a data signal to be transmitted stably at high speed over long distances without using thicker cables and without increasing physical quantities of such resources as transmitting-receiving circuit elements are disclosed. On the transmitting side, the phase of a clock signal relative to the data signal is modified in accordance with the distance between the transmitting and the receiving sides, the clock signal being transmitted along with the data signal. On the receiving side, the incoming data signal is received in synchronism with the received clock signal.

Method and apparatus for signal transmission

The invention relates to method and apparatus for adjusting a clock signal which is supplied to an electronic apparatus. After the turn-on of a power source of the electronic apparatus, it is detected that a temperature of at least a part of devices in the electronic apparatus substantially reaches a saturation state. When the temperature of the device reaches the saturation state, a phase adjustment of the clock signal of the electronic apparatus is executed. After completion of the phase adjustment of the clock signal, its adjusting state is fixed.

Method and apparatus for adjusting clock signal of electronic apparatus

A power supply device has its power supply conductor bars, in which a.c. currents caused by a.c. noises flow in the same direction, laid closely in parallel while retaining their insulation thereby to increase the total inductance so that the impedance increases without accompanied by an increase in the d.c. resistance of the power supply conductor bars. An increased coupling impedance of the power supply conductor bars effectively attenuates the a.c. noises from d.c. power units, which then supply d.c. power with reduced a.c. noises to an electronic apparatus such as a computer through the power supply device.

Growing community of inventors

Hadano, Japan

Yuzuru Fujita