Ps4 Luxco S.a.r.l.

Elpida Memory, Inc.

Nkk Corporation

Takuya Kadowaki

Kiyohiro Furutani

Takashi Ogawa

Tsutomu Shikada

Takeshi Furukawa

Masatsugu Mizuguchi

Yotaro Ohno

Kaoru Fujimoto

Masami Ono

Keiji Tomura

Norio Inoue

Sadayoshi Iwabuchi

A device includes a voltage converter circuit that includes an output node, a voltage drop circuit, and a first transistor. The first transistor is electrically coupled between the output node and the voltage drop circuit.

Semiconductor device

A device may include, but is not limited to, a bit line; a power line supplied with a power voltage; a sense amplifier circuit amplifying a voltage of the bit line by using the power voltage of the power line; and a control circuit configured to respond to an active command and supply, as the power voltage, the power line with a first voltage during a first period and a second voltage lower than the first voltage during a second period. The control circuit is further configured to respond to a refresh command and supply, as the power voltage, the power line with the second voltage during both the first and second periods.

To provide a semiconductor device including a temperature detection circuit that detects a temperature of the semiconductor device and outputs temperature information, a counter circuit that takes a count of repeated inputs of a refresh command and outputs count information, a comparison circuit that activates a match signal when the temperature information matches the count information, and a refresh control circuit that controls whether to perform a refresh operation according to activation of the refresh command based on the match signal. According to the present invention, a refresh cycle can be finely adjusted because the repeated inputs of the refresh command are thinned out based on the temperature information. With this configuration, power consumption caused by the refresh operation can be reduced.

Semiconductor device performing refresh operation

This invention provides a catalyst for producing hydrogen gas from a mixed gas comprising dimethyl ether and water vapor or carbon dioxide gas, which comprises copper, iron, cobalt, palladium, iridium, platinum, rhodium, or nickel as an active component, and a method of producing synthesis gas or hydrogen gas in a high yield at a low temperature. By using the catalyst, a fuel cell, electricity generation, reduction of iron ore and the like can be carried out.

Catalyst for manufacturing hydrogen or synthesis gas and manufacturing method of hydrogen or synthesis gas

Growing community of inventors

Tokyo, Japan

Takuya Kadowaki