η ترانزستور أحادي الوصلة قابل للبرمجة (بالإنجليزية: (PUT) Programmable unijunction transistor)‏ هو ترانزستور من أشباه الموصلات، يشبه في خصائصه الترانزستور أحادي الوصلة إلا أنه قابل للبرمجة.. تكوينه It is a close cousin to the thyristor and like the thyristor consists of four p-n layers. Wie ein Thyristor besteht der PUT aus vier alternierenden p-, n-dotieren Schichten und enthält damit drei p-n-Übergänge (Abb. The connections at the ends of the bar are known as bases B1 and B2; the P-type mid-point is the emitter. It is a close cousin to the thyristor and like the thyristor consists of four p-n layers. The programmable unijunction transistor, or PUT, is a multi-junction device that, with two external resistors, displays similar characteristics to the UJT. The programmable unijunction transistor, or PUT, is a multi-junction device that, with two external resistors, displays similar characteristics to the UJT. The programmable unijunction transistor, or PUT, is a multi-junction device that, with two external resistors, displays similar characteristics to the UJT. Programmable unijunction transistor (PUT) is a three-lead electronic semiconductor device with which is similar in characteristic to unijunction transistor except that it is programmable. Despite their names, the unijunction transistor (UJT) and programmable unijunction transistor (PUT) are not current-amplification devices like bipolar transistors. El transistor uniunión o transistor unijuntura (UJT del inglés UniJuntion Transistor) es un tipo de transistor constituido por dos zonas semiconductoras y, por lo tanto, una juntura p-n. El nombre del dispositivo surge de esta última característica. In construction, Programmable unijunction transistor is similar to Silicon controlled rectifier. The programmable unijunction transistor, or PUT, is a multi-junction device that, with two external resistors, displays similar characteristics to the UJT. PUT – Programmable Unijunction Transistor Characteristics of PUT. The programmable unijunction transistor, or PUT, is a close cousin to the thyristor. Its has a four layered construction just like the thyristors and have three terminals named anode (A), cathode (K) and gate (G) again like the thyristors. {\displaystyle \eta } It is a close cousin to the thyristor and like the thyristor consists of four p-n layers. Der 2N6027 ist ein Beispiel für derartige Bauelemente. Construction . It consists of four layers, two p-type layers and two n-type layers in equal proportion. In a unijunction transistor, the base region is divided into two parts by the emitter. Es ist ein Vorteil der PUTs, dass man mit ihnen Oszillatoren aus wenigen diskreten Bauelementen aufbauen kann (Abb. Programmable unijunction transistor or PUT is a close relative of the thyristor family. The original unijunction transistor types are now considered obsolete; but a later multi-layer device, the programmable unijunction transistor (PUT), is still widely available. What It Does. A bipolar junction transistor is a type of transistor that uses both electrons and electron holes as charge carriers. A unijunction transistor consists of two bases (B1, B2) attached to a resistive bar of silicon, and an emitter in the center. "Programmable Unijunction Transistor Flasher", "PUT - Programmable Unijunction Transistor - Working, Construction, Biasing - D&E notes". They are not directly interchangeable with conventional UJTs but perform a similar function. 2N6027/6028 is the current generation of parts and available from Mouser, Digikey, etc. Programmable unijunction transistor (PUT) is a three-lead electronic semiconductor device with which is similar in characteristic to unijunction transistor except that it is programmable [further explanation needed]. (en) Der Unijunctiontransistor (Abkürzung: UJT), oft auch Doppelbasisdiode genannt, wurde 1953 in den Bell-Laboratorien entwickelt. PUT: programmable unijunction transistor It is a device like the thyristor only the gate is connected to the N type material near the anode. It is used in free-running oscillators, synchronized or triggered oscillators, and pulse generation circuits at low to moderate frequencies (hundreds of kilohertz). The open circuit maximum amplitude of each of these signals is around 0.56 volt, however this could deviate a bit depending on specific UJTs. It is also a four-layer P-N-P-N solid-state device with a gate connected directly to the sandwiched N-type layer. A unijunction transistor (UJT) is a three-lead electronic semiconductor device with only one junction that acts exclusively as an electrically controlled switch.. Ähnlich wie ein normaler Bipolartransistor hat der Unijunction-Transistor drei Anschlüsse, im Gegensatz dazu aber nur einen pn-Übergang (engl. There are basically two output signals: a negative-going pulse at UJT base 2, and a positive-going pulse at base 1. Like the thyristor it consists of four P-N layers and has an anode and a cathode connected to the first and the last layer, and a gate connected to one of the inner layers. Silicon Controlled Switch (SCS) ou Thyristor Tetrode : un thyristor avec une gâchette pour l'anode et une pour la cathode. 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