Programmable unijunction transistor

{{Infobox electronic component

|name = Programmable unijunction transistor

|image =

|image_size =

|caption = Programmable unijunction transistor

|type = Passive

|working_principle =

|invented = General Electric{{cite web|url=https://www.electroschematics.com/6904/programmable-unijunction-transistor-put-flasher-circuit/|title=Programmable Unijunction Transistor Flasher|author=Jim Keith}}

|first_produced =

|symbol = 120px

|pins = anode, gate and cathode

}}

File:UJT caratteristica.png

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.{{cite web|url=https://www.daenotes.com/electronics/industrial-electronics/put-programmable-unijunction-transistor|title=PUT - Programmable Unijunction Transistor - Working, Construction, Biasing - D&E notes|website=www.daenotes.com|date=15 December 2017 }}