what is electronics ?

Answer 1

the technology where electricity is used as an information carrier rather than a power source. i guess

Answer 2

First of all lets break down this word

Electron...ics ( Electron)

Electron-ics is the physics of controlling how the electron behaves, well not actually, but mainly how we can control it using semiconductors

Capacitors and coils are not truly considered electronics but electrical, they behave the same if the polarity is reversed or in an AC circuit.
But semiconductors we can control the flow of electrons.

Now you know, have fun

Answer 3

Firstly, electronics is mainly defined under physics or engineering and not under astronomy and space.

Well i don't agree with the other definitions here. According to me an electronic system can be defined as a system
1) Which involves electrons, or electricity. (either AC or DC)
2) Which involves semiconductor devices like diodes, transistors etc. along with resistors(R) , capacitors(C) and inductors (L)

It is important to notice the difference between electrical and electronics. Electrical deals with only R,C,L whereas electronics deals with R,C,L plus semiconductor devices

Answer 4

The use of low voltage electricity or electrons to control circuitry within a semi conductor or intergrated circuit.

Answer 5

hi
the basic defination of electronic is a device work at a voltage level of >=12 v .like tv . commanly step down transformer are use to reduce the voltage from 230 v to 12 v.

Answer 6

Electronics are anything that uses electricity to operate.

Answer 7

Basically things or devices that contains a curcuit board with electronic conponents that all work together in connections to make it work.

tv / vcr / cell phone / radio / ect

Answer 8

Stuff that runs on electricity. More specifically, TV, laptops, cell phones, etc...
Did you really need to ask this question??

Answer 9

e·lec·tron·ics (ĭ-lĕk'trŏn'ĭks, ē'lĕk-)
n.
(used with a sing. verb) The science and technology of electronic phenomena.
(used with a pl. verb) Electronic devices and systems: The electronics aboard the new aircraft are very sophisticated.


electronics, science and technology based on and concerned with the controlled flow of electrons or other carriers of electric charge, especially in semiconductor devices. It is one of the principal branches of electrical engineering. The invention of the transistor, announced in 1948, and the subsequent development of integrated circuits have brought about revolutionary changes in electronics, which was previously based on the technology of the electron tube. The miniaturization and savings in power brought about by these developments have allowed electronic circuits to be packaged more densely, making possible compact computers, advanced radar and navigation systems, and other devices that use very large numbers of components (see microelectronics). It has also brought to the consumer such items as smaller and more reliable radio and television receivers, advanced sound- and video-recording and reproducing systems, microwave ovens, cellular telephones, and powerful yet inexpensive personal computers. The consumer electronics industry—which began in 1920 when radio broadcasting started in the United States—accounts for annual sales of close to $50 billion in the United States alone. Because of advances in electronics manufacturing technology, the cost of electronic products often decreases even as quality and reliability increase. Power requirements are continually reduced, allowing greater portability.


The noun electronics has one meaning:

Meaning #1: the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices


electronics
The field of electronics is the study and use of systems that operate by controlling the flow of electrons (or other charge carriers) in devices such as thermionic valves and semiconductors. The design and construction of electronic circuits to solve practical problems is part of the field of electronics engineering, and includes the hardware design side of computer engineering.

The study of new semiconductor devices and their technology is sometimes considered as a branch of physics. This page focuses on engineering aspects of electronics.

Overview of electronic systems and circuits

Commercial digital voltmeter checking a prototypeElectronic systems are used to perform a wide variety of tasks. The main uses of electronic circuits are the controlling, processing and distribution of information, and the conversion and distribution of electric power. Both of these uses involve the creation or detection of electromagnetic fields and electric currents. While electrical energy had been used for some time to transmit data over telegraphs and telephones, the development of electronics truly began in earnest with the advent of radio. One way of looking at an electronic system is to divide it into the following parts:

Inputs – Electronic or mechanical sensors (or transducers), which take signals from outside sources such as antennae or networks, (or signals which represent values of temperature, pressure, etc.) from the physical world and convert them into current/voltage or digital signals.
Signal processing circuits – These consist of electronic components connected together to manipulate, interpret and transform the signals. Recently, complex processing has been accomplished with the use of Digital Signal Processors.
Outputs – Actuators or other devices such as transducers that transform current/voltage signals back into useful physical form.
One example is a television set. Its input is a broadcast signal received by an antenna or fed in through a cable. Signal processing circuits inside the television extract the brightness, colour and sound information from this signal. The output devices are a cathode ray tube that converts electronic signals into a visible image on a screen and magnet driven audio speakers.

Electronic devices and components
Main article: Electronic component
An electronic component is any indivisible electronic building block packaged in a discrete form with two or more connecting leads or metallic pads. Components are intended to be connected together, usually by soldering to a printed circuit board, to create an electronic circuit with a particular function (for example an amplifier, radio receiver, or oscillator). Components may be packaged singly (resistor, capacitor, transistor, diode etc.) or in more or less complex groups as integrated circuits (operational amplifier, resistor array, logic gate etc). Active components are sometimes called devices rather than components.

Analog circuits
Main article: analog circuits

Hitachi J100 adjustable frequency drive chassis. Most analog electronic appliances, such as radio receivers, are constructed from combinations of a few types of basic circuits. Analog circuits use a continuous range of voltage as opposed to discrete levels as in digital circuits. The number of different analog circuits so far devised is huge., especially because a 'circuit' can be defined as anything from a single component, to systems containing thousands of components.

Analogue circuits are sometimes called linear circuits although many non linear effects are used in analoge circuits such as mixers, modulators etc. Good examples of analog circuits are valve or transistor amplifiers, operational amplifiers and oscillators.

Some analog circuitry these days may use digital or even microprocessor techniques to improve upon the basic performance of the circuit. This type of circuits is usually called 'mixed signal'.

Sometimes it may be difficult to differentiate between analog and digital circuits as they have elements of both linear and non linear operation. An example is the comparator that takes in a continuous range of voltage but puts out only one of two levels as in a digital circuit. Similarly, a transistor amplifier overdriven can take on the characteristics of a controlled switch having substantially only two levels of output.

Digital circuits
Main article: digital circuits
Digital circuits are electric circuits based on a number of discrete voltage levels. Digital circuits are the most common mechanical representation of Boolean algebra and are the basis of all digital computers. To most engineers, the terms "digital circuit", "digital system" and "logic" are interchangeable in the context of digital circuits. In most cases the number of different states of a node is two, represented by two voltage levels labeled "Low" and "High". Often "Low" will be near zero volts and "High" will be at a higher level depending on the supply voltage in use.

Computers, electronic clocks, and programmable logic controllers (used to control industrial processes) are constructed of digital circuits. Digital Signal Processors are another example.

Building-blocks:

logic gates
flip-flops
counters
registers
multiplexers
Schmitt triggers
Highly integrated devices:

microprocessors
microcontrollers
Digital signal processor (DSP)
Field Programmable Gate Array (FPGA)
Mixed-signal circuits
Main article: Mixed-signal circuit
Mixed-signal circuits refers to integrated circuits (ICs) which have both analog circuits and digital circuits combined on a single semiconductor die or on the same circuit board. Mixed-signal circuits are becoming increasingly common. Mixed circuits contain both analog and digital components. analog to digital converters and digital to analog converters are the primary examples. Other examples are transmission gates and buffers.

Heat dissipation and thermal management
Main article: Thermal management of electronic devices and systems
Heat generated by electronic circuitry must be dissipated to prevent immediate failure and improve long term reliability. Techniques for heat dissipation can include heatsinks and fans for air cooling, and other forms of computer cooling such as liquid cooling for computers. These techniques use convection, conduction, & radiation of heat energy.

Noise
Main article: electronic noise
Associated with all electronic circuits is noise. Noise is generally defined as any unwanted signal that is not present at the input of the circuit. Noise is not the same as distortion caused by the circuit.

Electronics theory
Main article: Mathematical methods in electronics
Mathematical methods are integral to the study of electronics. To become proficient in electronics it is also necessary to become proficient in the mathematics of circuit analysis.

Circuit analysis is the study of methods to solve linear systems for the unknown variables such as the voltage at a certain node or the current though a certain branch of a network. A common representation of this is the SPICE circuit simulator.

Also important to electronics is the study and understanding of electromagnetic field theory.

Electronic test equipment
Main article: Electronic test equipment
Electronic test equipment is used to create stimulus signals and capture responses from electronic Devices Under Test (DUTs). In this way, the proper operation of the DUT can be proven or faults in the device can be traced and repaired.

Practical electronics engineering and assembly requires the use of many different kinds of electronic test equipment ranging from the very simple and inexpensive (such as a test light consisting of just a light bulb and a test lead) to extremely complex and sophisticated such as Automatic Test Equipment.

Computer aided design (CAD)
Main article: Electronic design automation
Today's electronics engineers have the ability to design circuits using premanufactured building blocks such as power supplies, resistors, capacitors, semiconductors (such as transistors), and integrated circuits. Electronic design automation software programs include schematic capture programs such as ORCAD, used to make circuit diagrams and printed circuit board layouts.

Construction methods
Many different methods of connecting components have been used over the years starting with point to point wiring using tag boards attached to chassis, through printed circuit boards and ending with highly integrated circuits. Some of the methods previously used are:

Point-to-point construction
Cordwood construction
Wire wrap
Printed circuit boards