Pentode transistor

Pentode transistor

A pentode transistor is any transistor having five active terminals.

Early pentode transistors

One early pentode transistor was developed in the early 1950s as an improvement over the point-contact transistor.
*A point-contact transistor having three emitters. It became obsolete in the middle 1950s.

Modern pentode transistors

*Triple emitter transistor in three input transistor-transistor logic gates.
*Triple collector transistor in three output integrated injection logic gates.
*Field effect transistor having three gates.


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