A pentode transistor is any
transistor
upright=1.4, gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink).
A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch ...
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
US Patent 4,104,673 August 1,1978
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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
The field-effect transistor (FET) is a type of transistor that uses an electric field to control the flow of current in a semiconductor. FETs (JFETs or MOSFETs) are devices with three terminals: ''source'', ''gate'', and ''drain''. FETs contro ...
having three gates.
References
{{Electronic components
Transistor types