Ultrasonic Transducer: Ultrasonic Transducer (sound vibrations above 20 kHz) are useful when we are concerned with rapid temperature fluctuations, temperature extremes, limited access, nuclear or other severe environmental requirements and measurement of temperature distribution inside…
Ultra High Voltage Circuit Breakers: The specific requirements demanded of a Ultra High Voltage circuit breaker by system and operator considerations are at present considered to be the following. Speed of Operation: For Ultra High…
UJT Triggering of SCR Working Principle: UJT Triggering of SCR Working Principle - One common application of the unijunction transistor is the triggering of the other devices such as the SCR, triac etc. The basic…
UJT Relaxation Oscillator - Circuit Diagram and its Workings: UJT Relaxation Oscillator - The relaxation oscillator shown in Fig. 26.94 (a) consists of UJT and a capacitor C which is charged through resistor RE when…
UJT Circuit Diagram: UJT Circuit Diagram Operation : The Unijunction transistor (UJT) consists of a bar of lightly-doped n-type silicon with a block of p-type material on one side, [see Fig. 19-39(a)].The end terminals of…
UJT as Over Voltage Detector Circuit Diagram: UJT as Over Voltage Detector Circuit Diagram - A simple dc overvoltage detector circuit is given in Fig. 26.96. It operates on the fact that the device remains…
Typical Digital Filtering Operations: Digital filters in fact can be applied in many different parts of a signal and image processing transmission system. Two typical examples of systems in which typical digital filtering operations can…
Types of Unsymmetrical faults in Power System: There are two types of unsymmetrical faults in power system namely, Shunt Type Fault: Single Line to Ground Fault (LG) Line to Line Fault (LL) Double Line to Ground…
Types of Unit System: All physical quantities are measured in certain units. There are two Types of Unit System, namely: Fundamental units Derived units Fundamental Units: All the physical quantities arc expressed of the following…
Types of Travelling Wave Tubes: The TWT is the most versatile and most frequently used microwave tube. Four Types of Travelling Wave Tubes, each with particular applications and performance requirements. These are now described. TWT…