Electron Gun

Definition: Electron gun is defined as the source of focused and accelerated electron beam. It is a device used in Cathode Ray Tube for displaying the image on the phosphorous screen of CRT. The electron gun emits electrons and forms them into a beam by the help of a heater, cathode, grid, pre-accelerating, accelerating and…

Read more

Cathode Ray Tube (CRT)

Definition: The CRT is a display screen which produces images in the form of the video signal. It is a type of vacuum tube which displays images when the electron beam through electron guns are strikes on the phosphorescent surface. In other Words, the CRT generates the beams, accelerates it at high velocity and deflect…

Read more

Zener Diode

Definition: A heavily doped semiconductor diode which is designed to operate in reverse direction is known as the Zener diode. In other words, the diode which is specially designed for optimising the breakdown region is known as the Zener diode. The symbolic representation of Zener diode is shown in the figure below. Zener Diode Circuit…

Read more

Fabrication of Transistor

Definition: The fabrication of the transistor is the process of creating the transistor that is used in electrical and electronics circuit. It is a photo-lithographic or chemical process of creating the transistor on the wafer of semiconductor material. Mostly silicon is used for the fabrication. But compound semiconductor is also used for the manufacturing of…

Read more

Octal Number System

Definition: The number system whose base is 8 is known as the octal number system. The base 8 means the system uses eight digits from 0 to 7. All the eight digits from 0 to 8 have same physical meaning as that of decimal numbers. The next digit in octal number is represented by 10,…

Read more

PNP Transistor

Definition: The transistor in which one n-type material is doped with two p-type materials such type of transistor is known as PNP transistor. It is a current controlled device. The small amount of base current controlled both the emitter and collector current. The PNP transistor has two crystal diodes connected back to back. The left side…

Read more

Transistor Load Line Analysis

Definition: The load line analysis of transistor means for the given value of collector-emitter voltage we find the value of collector current. This can be done by plotting the output characteristic and then determine the collector current IC with respect to collector-emitter voltage VCE. The load line analysis can easily be obtained by determining the…

Read more

Operating Point in Transistor

 Definition: The point which is obtained from the values of the IC (collector current) or VCE (collector-emitter voltage) when no signal is given to the input is known as the operating point or Q-point in a transistor. It is called operating point because variations of IC (collector current) and VCE (collector-emitter voltage) takes place around this point when no…

Read more

Volt-Ampere Characteristic of a PN Junction Diode

The volt-ampere characteristic of the PN-junction diode is a curve between the voltage over the junction and the circuit current. The circuit arrangement of the curve is shown in the figure below. The circuit arrangement shows that the resistor is connected in series with the PN junction diode to limit the forward bias current from…

Read more

Common Collector Connection (or CC Configuration)

Definition: The configuration in which the collector is common between emitter and base is known as CC configuration. In CC configuration, the input circuit is connected between emitter and base and the output is taken from the collector and emitter. The collector is common to both the input and output circuit and hence the name…

Read more