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## Unijunction Transistor (UJT): Operation, Characteristics, Applications

A unijunction transistor (UJT) is a three-electrode device that contains one PN junction consisting of a bar of N-type material with a region of P-type material doped within the N-type material. See Figure 1.  The N-type material functions as the base and has two leads, base 1 (B1) and base …