The first transistor

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Date
1947
Credit Line
Reprinted with permission of Alcatel-Lucent USA, Inc.
Copyright Owner
© Alcatel-Lucent USA Inc.
Object ID
500004836

A plastic wedge secured two gold contacts to the first transistor’s germanium surface. Voltage applied to one contact modulated the current flowing through the other, amplifying the input signal up to 100 times.