18-04-2014, 03:30 PM
UJT CHARACTERISTICS
AIM:
To observe the characteristics of UJT and to calculate the Intrinsic Stand-Off Ratio (η).
APPARATUS:
Regulated Power Supply (0-30V, 1A) - 2Nos
UJT 2N2646
Resistors 10kΩ, 47Ω, 330Ω
Multimeters - 2Nos
Breadboard
Connecting Wires
THEORY:
A Unijunction Transistor (UJT) is an electronic semiconductor device that has only one junction. The UJT Unijunction Transistor (UJT) has three terminals an emitter (E) and two bases (B1 and B2). The base is formed by lightly doped n-type bar of silicon. Two ohmic contacts B1 and B2 are attached at its ends. The emitter is of p-type and it is heavily doped.
RESULT:
The characteristics of UJT are observed and the values of Intrinsic Stand-Off Ratio is calculated.