“Transistors”
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March 03, 2016 |
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“Transistors”
What is a transistor?
What is a transistor?
•A transistor is a 3 terminal
electronic device made of semiconductor material.
•Transistors have many uses,
including amplification, switching, voltage regulation, and the modulation of
signals
History
•Before transistors were invented,
circuits used vacuum tubes:
–Fragile, large
in size, heavy, generate large quantities of heat, require a large amount of
power
•The first transistors were
created at Bell Telephone Laboratories in 1947
–William
Shockley, John Bardeen, and Walter Brattain created the transistors in and
effort to develop a technology that would overcome the problems of tubes
–The first
patents for the principle of a field effect transistor were registered in 1928
by Julius Lillenfield.
– Shockley,
Bardeen, and Brattain had referenced this material in their work
•The word “transistor” is a
combination of the terms “transconductance” and “variable resistor”
•Today an advanced microprossesor can have as many as 1.7 billion
transistors.
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