For its first fifty years the phonograph turntable did not use electronics; the needle and soundhorn were purely mechanical technologies. However, in the 1920s radio broadcasting became the basis of mass production of radio receivers. The vacuum tubes that had made radios practical were used with record players as well, to amplify the sound so that it could be played through a loudspeaker. Television was soon invented, but remained insignificant in the consumer market until the 1950s. The transistor, invented in 1947 by Bell Laboratories, led to significant research in the field of solid-state semiconductors in the early 1950s. The transistor's advantages revolutionized that industry along with other electronics. By 1959 Fairchild Semiconductor had introduced the first planar transistor from which come the origins of Moore's law.Integrated circuits followed when manufacturers built circuits (usually for military purposes) on a single substrate using electrical connections between circuits within the chip itself. Bell's invention of the transistor and the development of semiconductors led to far better and cheaper consumer electronics, such as transistor radios, televisions, and by the 1980s, affordable video game consoles and personal computers that regular middle-class families could buy.
Changzhou Keliking Electronics Co., Ltd. Contact：Mr. Yao Mobile：13656128000 Tel：86 +519-88671999-801 Fax：86 +519-88671999-808 Add：1-1301 Hang Seng Science Park, Tianning District, Changzhou, Jiangsu, China
