永远做中国人民和中华民族的主心骨

百度 贵阳市轨道交通建设规划已于2016年7月获得国家发改委批复，轨道交通3号线一期取得项目立项。

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

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.