- published: 09 Jul 2013
- views: 1508078
A transistor is a semiconductor device used to amplify and switch electronic signals and power. It is composed of a semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.
The transistor is the fundamental building block of modern electronic devices, and is ubiquitous in modern electronic systems. Following its development in the early 1950s the transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things.
The thermionic triode, a vacuum tube invented in 1907, propelled the electronics age forward, enabling amplified radio technology and long-distance telephony. The triode, however, was a fragile device that consumed a lot of power. Physicist Julius Edgar Lilienfeld filed a patent for a field-effect transistor (FET) in Canada in 1925, which was intended to be a solid-state replacement for the triode. Lilienfeld also filed identical patents in the United States in 1926 and 1928. However, Lilienfeld did not publish any research articles about his devices nor did his patents cite any specific examples of a working prototype. Since the production of high-quality semiconductor materials was still decades away, Lilienfeld's solid-state amplifier ideas would not have found practical use in the 1920s and 1930s, even if such a device were built. In 1934, German inventor Oskar Heil patented a similar device.
Actors: Bruno Carstens (actor), Hans Flössel (actor), Dorit Gründel (costume designer), Madeleine Lierck (actress), Erich Brauer (actor), Werner Lierck (actor), Marianne Wünscher (actress), Gerd Natschinski (composer), Anneliese Hinze-Sokolowa (editor), Otto Krieg-Helbig (actor), Joachim Hasler (writer), Joachim Hasler (director), Dieter Scharfenberg (miscellaneous crew), Maurycy Janowski (writer), Thomas Natschinski (composer),
Plot: In this East German teen musical, a group of girls are planning to take their summer vacation together on the Baltic coast. When a loud and obnoxious group of boys intrudes on their holiday, the girls are horrified to learn that the boys have the same vacations plans as them. The two groups quarrel with each other and compete over a number of things, but gradually an attraction starts to form.
Keywords: baltic-sea, bathing, boys-and-girls, holiday, sand, seaside, singer, singing, song, summertime