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A  rectifier  is an electrical device composed of one or more diodes that converts alternating current (AC) to direct current (DC). A diode is like a one-way valve that allows an electrical current to flow in only one direction. This process is called rectification. A rectifier can take the shape of several different physical forms such as solid-state diodes, vacuum tube diodes, mercury arc valves, silicon-controlled rectifiers and various other silicon-based semiconductor switches. Rectifiers are used in various devices, including: DC power supplies Radio signals or detectors A source of power instead of generating current High-voltage direct current power transmission systems Several household appliances use power rectifiers to create power, like notebooks or laptops, video game systems and televisions. What is a rectifier? When the voltage is applied to the P-N junction diode in such a way that the positive terminal of the battery is connected to t...

An amplifier is an electronic device that increases the voltage, current, or power of a signal. Amplifiers are used in wireless communications and broadcasting, and in audio equipment of all kinds.  Or Amplifier is device which increase the strength of signal. An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal. An amplifier functions by taking power from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In this sense, an amplifier modulates the output of the power supply based upon the properties of the input signal. An amplifier is effectively the opposite of an attenuator: while an amplifier provides gain, an attenuator provides loss. Amplifier is made up of transistors. before invention of the transistor vacuum tubes were used in amplifier. Classification of Amplifiers 1-Type of Signal ...

Radio frequency engineers  are specialists within the electrical  engineering  field. They work with devices that transmit or receive  radio waves , including wireless  equipment, radios, and cellular phones. A background in general electronics, physics, and math is needed to design and improve  wireless  networks. In a descriptive form Radio‐frequency (RF) engineering is about systems that operate at radio frequencies such as microwave frequencies. This chapter begins with a look at the RF subsystem of a typical radio. This gives us a good view of how amplifiers, filters, mixers, and so on, may be organized in a typical RF subsystem. The chapter then elaborates on the “handle with care” aspects of RF and how it differs from low‐frequency circuits. It introduces some mathematical preliminaries, such as how we model RF subsystems and how we perform analysis on nonlinear effects. The chapter then tackles the problem of noise. Besides noise, i...

The world of electronics is all about electrical circuits, electronic components, and interconnected technologies. All these elements can be primarily  categorized  as digital, analog, or a combination of both. However, here we will be focusing on the basics of the analog category in detail.  Analog electronics  are  electronic  systems with a continuously variable signal, in contrast to digital  electronics  where signals usually take only two levels. Analog electronics  is a branch of electronics that deals with a continuously variable signal. It’s widely used in radio and audio equipment along with other applications where signals are derived from analog sensors before being converted into digital signals for subsequent storage and processing.  What is Analog ? Analog means continuous and real. The world we live in is analog in nature, implying that it’s full of infinite possibilities. The number of smells...

Don’t you hate it when the photos you’ve clicked doesn’t seem right even after a dozen attempts? You may not like its brightness, contrast, orientation or, you may want to add something to make the photos look catchy.That’s when photo editing apps come to your rescue. They pack a lot of features and are on par with lightweight desktop editors. Most social media apps already include editors in their interface. But, if you want more vivid customizations, you can use any of these photo editor apps we’ve compiled in this post. Adobe Photo Editor Adobe has released a plethora of editing tools over the last couple of years. Included are some of the best photo editor apps available. Some of the options include Adobe Photoshop Express, Adobe Photoshop Mix, and Adobe Lightroom. Each one has a variety of features to help you do things. You’ll be able to do simple stuff like removing red eye to editing RAW files taken by your smartphone or DSLR camera. Adobe Lightroom especially gets ...

“A Computer is an electronic machine that can solve different problems, process data, store & retrieve data and perform calculations faster and efficiently than humans”. Meaning of the word "Computer" Computer is derived from a Latin word “computare” which means to  “to calculate” , “to count” ,  “to sum up”  or   “to think together” . So, more precisely the word computer means a  "device that performs computation ". The basic parts of a computer system are: Monitor CPU (Central Processing Unit) Keyboard Mouse Speakers Printer   Input Devices: Devices that help us put data into the computer are called input devices. They help in giving instructions to the computer.  Let us learn about a few input devices . Keyboard: The keyboard is used for entering data into the computer system. It can type words, numbers and symbols.   Mouse:  The mouse is a pointing device. You can give input to t...

A supercomputer is a type of computer that has the architecture, resources and components to achieve massive computing power. Today's supercomputers consists of tens of thousands of processors that are able to perform billions and trillions of calculations or computations per second. Supercomputers are primarily are designed to be used in enterprises and organizations that require massive computing power. A supercomputer incorporates architectural and operational principles from parallel and grid processing, where a process is simultaneously executed on thousands of processors or is distributed among them. Although supercomputers houses thousands of processors and require substantial floor space, they contain most of the key components of a typical computer, including a processor(s), peripheral devices, connectors, an operating system and applications. As of 2013, IBM Sequoia is the fastest supercomputer to date. It has more than 98,000  processors  that allow it t...