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


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