Nissan Motor Company Limited

Other

Kobayashi Pharmaceutical Co., Ltd.

Yutaka Tajima

Yasuhiko Kitajima

Kantaro Yoshimoto

Yasuaki Hayami

Ryuuta Yamaguchi

Masanori Yamagiwa

Kenji Asano

Kunihiro Asada

Yukiko Matsuda

A power conversion system for converting a dc voltage to a pulsed ac voltage includes a dc voltage source providing three or more electric potentials, and a switching circuit arranged to connect one of the potentials selectively to an output terminal. A controller produces a pulsed ac output voltage at the output terminal from the potentials of the dc voltage source by controlling an on time for connecting each of the potentials to the output terminal.

Power conversion and vehicle

It is an object of the present invention to provide immunopotentiators and immunotherapeutic formulations available at low cost and having a benign side effect profile. According to the present invention, an LAK activity enhancer containing an extract of Lentinus edodes mycelium and an LAK activity-enhancing formulation containing said enhancer are provided.

Lak activity potentiator orginating in shitake mushroom hyphae extract and lak activity potentiating preparations containing the same

A semiconductor device includes an N-well arranged in the principal surface of a P-type semiconductor substrate, an N.sup.+ well contact arranged in the principal surface of the N-well, and an N.sup.+ buried region arranged to the bottom of the N-well.

Complementary insulated-gate field-effect transistors having improved

Described are method and apparatus for protecting content of a semiconductor non-volatile memory and a semiconductor non-volatile memory itself, the semiconductor non-volatile memory being constituted by, for example, a flash memory, so that a reduction in a life time of the non-volatile memory due to an excess number of times a refresh (rewrite) operation can be prevented. For example, a first data deterioration determining voltage V.sub.1 is applied via a row decoder to one of word lines to which a selected bit is connected to determine whether the selected bit is turned on and a second data deterioration determining voltage V.sub.2 is applied to the same word line to determine whether the selected bit is turned off. The results of the determinations are stored in a second memory unit. If the selected bit is turned on in the former result and is turned off in the latter result, a control circuit determines that the data in the selected bit is deteriorated and carries out the refresh operation for the selected bit. The value of V.sub.1 is set which falls in a voltage range from a relatively high threshold voltage to a rated power supply voltage (V.sub.CC) and the value of V.sub.2 is set which falls in a voltage range from the power supply voltage (V.sub.CC) to a relatively low threshold voltage.

Method and apparatus for protecting content of semiconductor

Growing community of inventors

Kanagawa, Japan

Yutaka Tajima