![]() For digital signals, signal processing may involve compression, error checking and error detection, and correction. Signals can be either analog, in which case the signal varies continuously according to the information, or digital, in which case the signal varies according to a series of discrete values representing the information.įor analog signals, signal processing may involve the amplification and filtering of audio signals for audio equipment and the modulation and demodulation of radio frequency signals for telecommunications. This section describes some of the most popular.Įlectronic signal processing deals with the analysis and manipulation of signals. The discipline was further enhanced by the large amount of electronic systems development during World War II in such as radar and sonar, and the subsequent peace-time consumer revolution following the invention of transistor by William Shockley, John Bardeen and Walter Brattain.Įlectronics engineering has many subfields. By the early 1920s, commercial radio broadcasting and communications were becoming widespread and electronic amplifiers were being used in such diverse applications as long-distance telephony and the music recording industry. Practical applications started with the invention of the diode by Ambrose Fleming and the triode by Lee De Forest in the early 1900s, which made the detection of small electrical voltages such as radio signals from a radio antenna possible with a non-mechanical device. The International Electrotechnical Commission (IEC) publishes electrical standards including those for electronics engineering.Įlectronics engineering as a profession emerged following the identification of the electron in 1897 and the subsequent invention of the vacuum tube which could amplify and rectify small electrical signals, that inaugurated the field of electronics. The Institute of Electrical and Electronics Engineers (IEEE) is one of the most important professional bodies for electronics engineers in the US the equivalent body in the UK is the Institution of Engineering and Technology (IET). It is also involved in many related fields, for example solid-state physics, radio engineering, telecommunications, control systems, signal processing, systems engineering, computer engineering, instrumentation engineering, electric power control, photonics and robotics. It covers fields such as analog electronics, digital electronics, consumer electronics, embedded systems and power electronics. ![]() Previously electrical engineering only used passive devices such as mechanical switches, resistors, inductors, and capacitors. Electronic engineering involved in the design of electronic circuits, devices, and their systems Printed circuit boardĮlectronic engineering is a sub-discipline of electrical engineering that emerged in the early 20th century and is distinguished by the additional use of active components such as semiconductor devices to amplify and control electric current flow.
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