G.992 Annex C <Annex C>

Field:
Communication service > broadband > xDSL > G.992 Annex C

G.992 which is one of ADSL standard (G.dmt/G.Lite), among the incidental standards which add the stipulation which considers the communication circumstance of each area of the world, for Japanese ones. In addition, for North American Annex A and for European Annex B are prepared.

The ISDN circuit of the TCM-ISDN system which is adopted in Japan same period it does, it prevents the speed decrease with interference by changing transmission speed according to the size of interference.

The NTT regional company ([huretsutsu] ADSL) and, as for domestic enterprise such as eAccess large portion has adopted Annex C. But there is also an enterprise which because as for Annex C because of the Japanese private standard cost is high, actualizes cost reduction even in the country does service with Annex A of the North American specification.

GaAs <Gallium arsenide>

Reading: [gariumuhiso]
Field:
Semiconductor > basis technology > GaAs

But as for IC main current silicon (Si) those which it uses as the semiconductor, those which utilize GaAs Si compared to operate at high speed, electric power consumption and approximately 1/3 are little, a feature that is miniaturization are easy. However, GaAs being expensive in comparison with Si, obtaining GaAs whose purity is high is more difficult than Si. In addition, because it is brittle, also processing is difficult.

Recently, also the GaAs device is supplied cheaply with such as progress of microprocessing technology it has reached the point where, the portable telephone and the like being small-sized, the use where high frequency quality is required to be wide it has spread on the center.

GaAs is said unlike Si which is formed from the element of the single unit, Ga (gallium) with As (arsenic) because of the semiconductor which consists of chemical compound, even the compound semiconductor.

Galileo <Galileo>

Field:
Mobile > PDA > Galileo

First there was no thing where PDA “Zaurus” which is sold from sharp large because it hits, as for Galileo's sale becomes undecided in the country, is sold after all as the commodity.

GAMEBOY <Game boy>

Field:
Multimedia > game > game machine for home > GAMEBOY

The portable game machine which Nintendo Co. sells in 1989 April. 8000 Yen the convenient price which is said and, being abundant, it could accept to the children of the Family Computer generation the stock of the good quality game software widely, became fixed turn of the portable game machine.

After that, the frame was made small size lightweight, the “game boy pocket” (1996 July sale) and, back light was equipped the “game boy light/write” (1998 April), had the color liquid crystal picture for the game boy pocket, the “game boy color” (1998 October) and the like, many derivative items are born, to presently the sum total shipment quantity of the entire world exceeds 100,000,000.

In addition, in 1998 prints the digital camera “pocket camera” which can be connected to the game boy and, the screen in the seal the peripheral device such as the “pocket printer” to appear, method of enjoying where the portable game machine is new was proposed.

GAMEBOY ADVANCE <Game boy advance>

Alias:
GBA
Field:
Multimedia > game > game machine for home > GAMEBOY ADVANCE