Nec Corporation

Renesas Electronics Corporation

Yuu Yamaguchi

Noriaki Matsuno

Tadashi Maeda

Tomoyuki Yamase

Tomonobu Kurihara

Orie Tsuzuki

Yoshinori Horiguchi

Isao Sakakida

An information storage device includes a storage that stores transfer data from an information processing device, the information storage device being removably connected to the information processing device, a switch unit that switches a data transfer mode of the information processing device in accordance with manipulation by a user, and a controller that controls the information processing device to transfer data in a mode in which data temporarily stored in a data storing area is transferred to the storage or in a mode in which data is transferred to the storage without being temporarily stored in the data storing area in accordance with the selection of the data transfer mode by the switch unit.

Information storage device, information processing system, and setting method of data transfer mode of information processing device

A signal processing device includes a detecting part that detects intensity of an input signal, a timer part that includes a time constant circuit and measures time based on a time constant of the time constant circuit, and a determination circuit that counts the number of times of switching of the input signal detected by the detecting part within the time measured by the time constant circuit.

Signal processing device

A dielectric refractor, a refractive index of which varies in accordance with a frequency, is situated between a primary horn serving as a electric wave source and a concave sub-reflector. A desired transmitting wave in the desired transmitting frequency band is refracted by the dielectric refractor so as to illuminate the sub-reflector. An undesired transmitting wave outside the desired transmitting frequency band is refracted by the dielectric refractor so as to pass along a path for the undesired wave, and reaches a electric wave-absorber to be absorbed thereby. Accordingly, the undesired transmitting wave does not reach the sub-reflector, and is prevented from being radiated to the outside of the antenna apparatus via the sub-reflector and the main reflector.

Antenna apparatus

For the purpose of enhancing power efficiency, according to the invention featuring efficiency control to maximize power efficiency, an arithmetic circuit calculates the input power from a detected voltage and a detected amperage, and also calculates the power efficiency of an amplifier from the input power and output power levels. The calculated efficiency value is outputted to a comparator and stored into a memory element. The comparator compares the currently inputted efficiency value and the efficiency value stored into the memory element in the preceding round. If the current efficiency value is higher than that of one round before, the gate voltage control circuit is controlled in the same direction as that of the control of the preceding round. If the current efficiency value is lower than that of one round before, the gate voltage control circuit is controlled in the direction reverse to that of the control of the preceding round. If the current efficiency value is identical with that of one round before, the gate voltage control circuit is controlled so as to keep the gate voltage at its level in the preceding round.

Growing community of inventors

Kawasaki, Japan

Yuu Yamaguchi