Monday, May 26, 2008

Transistor

An electronic device that can be used to control the flow of current.

Field effect transistor:
A transistor using electric field for accumulating or depleting one of the channel region, which is used for the allowing or stoping conduction.(W. Shockley et al.)The "field-effect" type of transistor is one in which the conductivity of a layer of semiconductor is modulated by a transverse electric field. A unipolar field effect transistor is one in which, the amplifying action involves currents carried pre-dominantly by one kind of carrier.

(Piet Bergveld et al.)Ion sensitive field effect transistor is a type of transistor that makes it easy to sense the ionic activities without using the reference electrodes.

References:
Piet Bergveld, Development, Operation, and Application of the Ion-Sensitive Field-Effect Transistor as a Tool for Electrophysiology. IEEE transactions on biomedical engineering Sept. 1972, Volume: BME-19, Issue: 5, Pages 342-351.

W. Shockley, A Unipolar "Field-Effect" Transistor. Proceedings of the IRE, Nov. 1952 Volume: 40, Issue: 11, Pages 1365-1376.

Further Reading:
Transistor Circuit Techniques: Discrete and integrated, 3rd Edition by Gordon J. Ritchie

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