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 tansistors having 3 gates, similar to vacuum tube pentodes have also been described 8ytuy7y tut tit u7ijker7djuijh utiu 78gtejr ptiyuhhdhh uu jkluihjkbnls iu

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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 having three gates.