Introduction In the previous section, we have learned about Decimal & Binary number systems. Generally in digital systems representation and operations on long strings is very common .We cannot effectively represent a number with more number of binary digits(long string) in binary number system. So to represent the long strings easily , we use another […]

## SCR Turn OFF Methods

Introduction In the previous articles we have seen SCR Turn on methods , where it can be turned ON by applying appropriate positive gate voltage between the gate and cathode terminals, but it cannot be turned OFF through the gate terminal. The SCR can be brought back to the forward blocking state from the forward conduction state […]

## SCR Turn ON Methods

Introduction We know that the SCR has two stable states as forward blocking and forward conduction state. Switching the SCR from forward blocking state (OFF- state) to forward conduction state (ON- state) is known as turning ON process of SCR . It is also called as triggering. The criteria for triggering the SCR depends on […]

## Binary to Decimal Conversion

The representation of numbers is called “Number system” or “Numeral system”. In the view of digital electronics, the number system is of many types such as ‘Binary’, ‘Octal’, ‘Hexadecimal’, ‘Decimal’ etc. Decimal Number System This is the number system which we are using in our daily life. In this system, we consider the positions of digits […]

## Silicon Controlled Rectifier

Introduction The Silicon Controlled Rectifier (SCR) is the most important and mostly used member of the thyristor family. SCR can be used for different applications like rectification, regulation of power and inversion, etc. Like a diode, SCR is a unidirectional device that allows the current in one direction and opposes in another direction. SCR is […]

## PNPN Diode or Shockley Diode

Even though the shockley diode is not available commercially and it is not particularly useful, the model technique of shockley diode is very useful in creating other types of thyristors like SCR, DIAC and TRIAC etc. It is the first member of thyristor family devices and it is named after the inventor William Bradford Shockley. […]

## Thyristor Basics

Introduction Nowadays, many electromechanical or electrical equipments from household appliances, such as uninterrupted power supplies to industrial power and motor control equipments , consist of power electronic circuits, in which thyristors play an important role as solid-state switching devices. The conventional methods of power control involve use of variable tap-changing transformers, shunt and series regulators […]

## Signed Binary Numbers

Introduction In general, we represent the positive (unsigned) numbers without any sign indication and negative numbers with ‘minus’ (negative sign) sign before them. But these are not applicable for computing in the digital systems like, computers , as the data is represented in binary number system. So to represent the sign a special notation is […]

## Maximum Power Transfer Theorem

Introduction In any electric circuit, the electrical energy from the supply is delivered to the load where it is converted into a useful work. Practically, the entire supplied power will not present at load due to the heating effect and other constraints in the network. Therefore, there exist a certain difference between drawing and delivering […]

## Superposition Theorem

Introduction For analysing the linear electric circuits that consists of two or more independent sources (Voltage or current or both), superposition theorem is extremely used (particularly for time domain circuits with elements operated at different frequencies). If a linear DC circuit has more than one independent source, we can find the current (through a resistance) […]

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