Hitachi, Ltd.

Fujitsu Corporation

Oki Electric Industry Co., Ltd.

Nippon Electric Co., Ltd.

Nippon Telegraph and Telephone Public Corporation

Koichi Hasegawa

Yusuke Mure

Ryo Sawai

Kazuya Taniguchi

Hideo Mizutani

Takashi Yamamoto

Michio Tokunaga

Yasuo Tsumurai

Tetsuro Aobori

Takaaki Osaki

Ryoichi Okada

A data processing system includes a plurality of power supply modules each having a comparing unit for comparing an output-current value supplied to a computer with a threshold value, the plurality of power supply modules continue the comparison when the output-current value is equal to or less than the threshold value and outputs an output-current excess signal to a plurality of server blades when the output-current value is equal to or greater than the threshold value, and the plurality of server blades control respectively power consumptions of the server blades to make a power consumption value of the server blades to an equal to or less than a predetermined value on a power source non-redundancy.

Data processing system having power capping function in response to output state of power supply module

Electric fan

A current supply circuit for a telephone exchange is disclosed in which a current-supplying current amplifier series-connected between a power supply and a load amplifys an output current of an input current supply circuit, and a driving current amplifier for driving the current-supplying current amplifier is controlled by an output of an output voltage detector parallel-connected with the load in a negative-feedback fashion to set the differential mode output impedance of the current supply circuit at a large or small value in accordance with frequency and to set the common mode output impedance at a small value; and in which a part of the output voltage detector for connecting the load to the driving current amplifier includes a diode for preventing a direct current from flowing in a opposite direction to that of a direct current from the power supply in order to suppress, independently of the state of the load, a current which flows from the load side into the driving current amplifier, whereby an increase in current is restricted and an on-off control can be conducted in a short time without impairing an essential function of the current supply circuit.

Current supply circuit for telephone exchange

Growing community of inventors

Hadano, Japan

Koichi Hasegawa