Direct current–direct current (dc–dc) power converters are employed in a variety of applications, including power supplies for personal computers, office equipment, spacecraft power systems, laptop computers, and telecommunications equipment, as…
For a d.c shunt motor, change of speed from no load to full load is quite small. Therefore, mechanical loss can be assumed to remain same from no load to…
What is digital communication? Digital communication is a mode of communication where the information or the thought is encoded digitally as discreet signals and electronically transferred to the recipients. Digital…
Household batteries “Household batteries” are the small portable batteries used daily by most people in devices such as radios, toys, flashlights and lanterns, games, watches, calculators, cameras, telephones and other…
Protection zone is defined as the part of the power system which is protected by a certain protective scheme. It is established around each power system equipment. When the fault occurs on…
WHAT IS MOSFET? MOSFET is metal-oxide semiconductor field-effect transistor. MOSFET is an important semiconductor device and widely used in many applications. The input impedance of MOSFET is much more than…
Basic Principle of Operation The basic equivalent circuit of cycloconverter is shown in fig.1. Each two-quadrant converter (phase-controlled) is represented as an alternating voltage source, which corresponds to the fundamental…
Basic block diagram of communication system: Figure 1. Block diagram of Communication System Input transducer: The device that converts a physical signal from source to an electrical, mechanical or electromagnetic…
An Amplifier’s Common Connection Transistors in amplifiers commonly use one of three basic modes of connection. A transistor has three connections (collector, base and emitter), whilst the input and output…
Amplifiers Introduction to Amplifiers An amplifier is used to increase the amplitude of a signal waveform, without changing other parameters of the waveform such as frequency or wave shape. They…