File:Bell telephone magazine (1922) (14755881622).jpg

English: Photo of (left to right) John Bardeen, William Shockley and Walter Brattain, 1948. This is one of a series of publicity photos produced by Bell Labs prior to the public announcement of the invention of the transistor (June 30, 1948). Although Shockley was not involved in the invention, and has never been listed on patent applications, Bell Labs decided that he must appear on all publicity photos along with Bardeen and Brattain. Shockley's Nobel Prize contribution - theory of a junction transistor - was separate from the Bardeen-Brattain work.

English:

Identifier: belltelephonevol3132mag00amerrich (find matches)
Title: Bell telephone magazine
Year (corrected): 1948 Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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the analog ends. The transistor is solid, there is no vacuum to maintain. It is cold, there is no need for a heater to supply electrons. Because of this it requires very little power to be ready to operate and very little power to operate, for it is effient. It is small and rugged. It will almost certainly have long life in service. And we are finding many ways for it to be of service. Early Uses of the Transistor A GREAT MAJORITY of conventional vacuum tubes are used to control or amplify small currents : in communication systems, in radio and television sets, in complicated military equipments such as radar bomb sights and computers. In such applications the transistor can be used. It does not replace the vacuum tube in the same socket and the same circuit. But with its own circuits it does the same jobs. The point-contact transistor has been used in oscillators from very low frequencies to the very high frequencies of short-wave radio. It has been 1953 The First Five Years of the Transistor 75
Text Appearing After Image:
With this apparatus some of the first investigations leading to the discovery of the transistor were made. Standing are John Bardeen (left) and Walter H. Brattain, inventors of the point-contact transistor. Seated is William Shockley, who directed the Laboratories research program in semiconductors used over this wide frequency range to amplify and to control electrical signals. And it has been used, together with other very small components, to make a variety of compact electronic packages which perform a great many of the functions required in the modern electronic art. With its virtues there are also some limitations: the point-contact transistor is more noisy in a circuit than one would like, and its ability to handle power is limited. The noise tends to restrict Its use to the control of electrical signals rather than their generation or amplification and its power capacity limits it to relatively small currents. The point-contact transistor, first member of the family, has been join

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