Pentode transistor
A pentode transistor is any transistor having five active terminals.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 describedModern pentode transistors
