Q. Compare suitability of Si, SiC, GaN, and Sapphire being used for Modern Power Semiconductor Devices? Ans. S.No. Characterisitcs Si SiC (3H)/SiC (6H) GaN Sapphire 1. Energy gap at 300K (eV) 1.12 2.23/2.9 3.2 5.47 2. Maximum operating temperature (°C) 300 873/1240 600 1100 3. Mobility at 300 K — electron — Hole 1350 430 … Read more
S.No. Characterisitics Thyristor MOSFET IGBT 1. Type of Device Minority carrier Majority carrier Minority carrier 2. Rating very high Voltage, very high Current Medium Voltage, high Current high Voltage, high Current 3. Switching frequency low very high (~ MHz) high (~ 100kHz) 4. On-state drop low higher (increasing) low 5. On-state losses low considerable less … Read more
Uninterrupted Power Supply (UPS) is of three types. Offline UPS Offline preferred UPS Online UPS S.No. Parameters Offline UPS Offline Preferred UPS (Line interactive UPS) Online UPS 1. Type Sine wave or Quasi-sine wave sine wave sine wave 2. Voltage Mains/regulated voltage (±9%) Regulated voltage (±9%) Constant rated voltage 3. Frequency mains mains constant frequency … Read more
The data is transmitted from one place to other through different mediums. All transmission system has two devices i.e. transmitting and receiving end devices. These two devices are connected through a medium. there are two types of transmission i.e. Baseband transmission Broadband transmission Baseband transmission When data are sent without modulation, usually over wires or … Read more
In this article, we will learn about Sample and Hold (S/H) Circuit. These circuits are used in Analog to Digital (ADC) conversion and Switched Capacitor filters. Sample and hold circuits are used to sample an analog signal and to store its value for some length of time (for digital code conversion). Function of Sample & Hold … Read more
An inductor is an electronic device which stores energy in the form of magnetic field. It opposes the changes in the current passing through it. An inductor is just a coil of wire around some kind of core. The core could be just air or it could be a magnet. The amount of magnetic field … Read more
A capacitor is an electronic device which stores energy in the form of the electrostatic field. It consists of two parallel conducting plates which are separated by an insulating material known as the dielectric. The commonly used dielectrics in capacitors are paper, mica, air etc. These conducting plates could be in the form of rectangular, circular, … Read more
When you read about circuits, you must come across terms analog and digital. Generally, electronic circuits can be analog circuits or digital circuits. Digital electronics involves quantities with discrete values, & analog electronics involves quantities with continuous values. Let see the definition of the terms analog and digital. Analog quantity The quantity that has continuous values … Read more
Transformer Noise When you crossed across a transformer in your locality, you might have listened to the humming noise coming from the transformer. It is quite annoying if the transformer is located in a residential area. The cause of transformer noise is the magnetostriction. We have written an article on Magnetostriction topic. As we know … Read more
Energy conservation means reduction in energy consumption but without making any sacrifice in the quality or quantity of production. It refers to increase the production from a given amount of energy input by reducing losses/wastage and maximizing the efficiency. Even though energy conservation reduce energy services, it can result in improved environmental quality, national security, personal financial … Read more