Programmable unijunction transistor
Today, we want to talk about Programmable unijunction transistor. This is a topic that has gained great relevance in recent times, and it is important to study it in depth to understand its impact on our society. Throughout this article, we will explore different aspects of Programmable unijunction transistor, from its origin and evolution to its influence in various areas. In addition, we will analyze the different perspectives that exist on Programmable unijunction transistor, in order to offer a comprehensive and objective vision. Without a doubt, Programmable unijunction transistor is a topic that invites us to reflect and debate, and we are sure that this article will be enriching for our readers.
| Component type | Passive |
|---|---|
| Inventor | General Electric[1] |
| Pin names | anode, gate and cathode |
| Electronic symbol | |
 | |
A programmable unijunction transistor (PUT) is a three-lead electronic semiconductor device which is similar in its characteristics to a unijunction transistor (UJT), except that its behavior can be controlled using external components. In a UJT, the base region is divided into two parts by the emitter. The two parts of the base form a voltage divider, which sets the operating point of the UJT. That voltage divider can be programmed with two physical resistors connected to the gate terminal of the PUT. This allows the designer some control over the operating point of the PUT.[2]
Construction
In construction, the programmable transistor is similar to the silicon controlled rectifier (SCR). Like SCR, it consists of four layers ‒ PNPN ‒ but its gate is connected to the second layer (N-type), not the third one (P-type) as with SCR.[1]
Applications
- It is used to trigger thyristors.
- It is also used as a relaxation oscillator.
As of 2012 ON Semiconductor manufactured a part: 2N6027. 2N6028 was also made in the past.[1]
References
- ^ a b c Jim Keith. "Programmable Unijunction Transistor Flasher". Archived from the original on 2018-03-05.
- ^ "PUT - Programmable Unijunction Transistor - Working, Construction, Biasing - D&E notes". www.daenotes.com. 15 December 2017. Archived from the original on 2018-01-05.
 | This electronics-related article is a stub. You can help Wikipedia by expanding it. |