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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...

Electronics engineering, or electronic engineering, is an electrical engineering discipline which utilizes non-linear and active electrical components (such as semiconductor devices, especially transistors, diodes and integrated circuits) to design electronic circuits, devices, microprocessors, micro controllers and other systems.  It also deals with the design and application of circuitry and equipment for power generation and distribution, machine control, and communications.   In other worlds we say that electronics engineering is an area which purely describes the study and areas of electricity, electronics and electromagnetism. Due to many amendments taken place in the field of electronics, electronics engineering has been divided into many sub categories including digital computers, power engineering, telecommunications, control system, radio frequency engineering, signal processing, microelectronics and instrumentation.Electronics engineering homework help p...