Spacistor

The spacistor [cite book
last = Wolf
first = Oswald
coauthors = R. T. Kramer; J. Spiech; H. Shleuder
title = Special Purpose Transistors: A Self-Instructional Programmed Manual
publisher = Prentice Hall
year = 1966
pages = pp. 103-117] was a type of transistor developed in the 1950s as an improvement over the point-contact transistor and the later alloy junction transistor. It offered much higher speed than earlier transistors.

It is composed of a P-N junction with a wide depletion region, inside which two additional contacts are made: the "injector" and the "modulator". The P material was called the "base" and the N material was called the "collector". The "injector" acted like a standard bipolar junction transistor's emitter, the "modulator" like a standard bipolar junction transistor's base, and the "collector" acted like a standard bipolar junction transistor's collector. It achieved its high speed by reducing the charge carrier's transit time. It became obsolete in the early 1960s with the development of the diffusion transistor.

References

External links

* [http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4056508 The Spacistor, A New Class of High-Frequency Semiconductor Devices]
* [http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1472961 The Spacistor]