NPN Transistor as a Switch | switching circuit

A switch or key is useful to ON or OFF the circuit connection to activate or deactivate a device. For example, if we want to ON or OFF a fan or a TV or a Tube light we need to press switches. Sometimes, in physics laboratory we use tapping key to connect the circuit to … Read more

Darlington pair amplifier Transistor – circuit, theory & gain

We know that a Transistor can amplify the electric current at its output. Often, the amount of the amplified output does not meet the required criteria. That means we need the output current more than that. Then scientist Darlington proposed a new circuit arrangement with two coupled transistors which provides a huge current gain. This … Read more

Input and output characteristics of Transistor |curve

In another article, we have discussed the Bipolar Junction Transistor and the differences between NPN and PNP transistors. Transistor characteristic curve is a very much useful parameter to understand the basic principle and operation of a Transistor. Therefore, in this article, we are going to discuss the input and output characteristics of a Transistor. The … Read more

BJT Transistor – NPN and PNP BJT Transistors

Bipolar Junction Transistor (BJT) is one of the very important electronic circuit components in the world of electronics. Scientist William Shockley discovered the first Transistor in 1948. In modern days, the technology is very much progressive and many variety of transistor have been discovered. These transistors are widely used in analog and digital electronics. In … Read more

Difference between NPN and PNP Transistor in tabular form

Transistor is one of the basic circuit components for electronic operations. The main purpose of a Transistor is to Amplify electronic signals at the output of a circuit. We already know that there are two types of Transistors – NPN and PNP. An NPN Transistor can be formed by sandwiching p-type material or acceptor atoms … Read more