What is MOSFET? Types, Operation and Applications

The MOSFET (Metal Oxide Field Effect Transistor) is an active semiconductor device most widely used in Integrated circuits. It is a voltage-controlled device because the current between source and drain is controlled by the gate voltage. MOSFET is a unipolar device because the charge carriers that are responsible for current are either electron (in NMOS) … Read more

Single Phase Half Wave Uncontrolled Rectifier with R Load

In this article, we will see the analysis of Single Phase Half Wave Uncontrolled Rectifier with Resistive (R) Load as shown in Figure 1. Vs is supply and ‘is‘ is the source current. VD and ‘iD‘ is the diode voltage and current respectively. Vo and ‘io‘ is the load voltage and current respectively. Vs = Vmsin(ωt) Step-1: … Read more

Thyristor Protection or SCR Protection

For the normal working of Silicon controlled rectifier (SCR), the operating conditions should not exceed SCR’s specified ratings. But practically, the SCR may be subjected to abnormal conditions such as overvoltages, overcurrent, high dv/dt, high dI/dt and excessive heating. This may lead to the SCR to work abnormally and may cause unwanted turn-on or permanent … Read more

Electric Current & its Types

The amount of charge flowing through any cross-section of a substance in a unit time is called Electric current. It can also be defined as the rate of flow of charge through any cross-section of a substance. If the electric current does not change with time, then electric current, i = q/t where q = … Read more

Switches – Types & Characteristics

A switch is an electrical component that can “make” or “break” an electrical circuit. A switch mainly works with ON and OFF mechanism. Types of Switches 1. Ideal Switch 2. Practical Switch Ideal Switch 1. It should have zero resistance or zero voltage drop in ON state and infinite resistance or zero current during OFF … Read more