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.

Pentode field-effect transistors having 3 gates, similar to vacuum tube pentodes have also been described[1]

## 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.

## References

1. ↑ US Patent 4,104,673 August 1,1978

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Electronic components

Semiconductor
devices|

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|

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Reactive|

* Capacitor
* types
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