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Electronics is the study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles in devices such as thermionic valves and semiconductors. The pure study of such devices is considered as a branch of physics, while the design and construction of electronic circuits to solve practical problems is called electronic engineering.
The main uses of electronic circuits are the controlling, processing and distribution of information, and the conversion and distribution of electromagnetic power. Both of these uses involve the creation or detection of electromagnetic fields and electric currents.
While electricity 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. Today, electronic devices perform a much wider variety of tasks.
One way of looking at an electronic system is to divide it into the following parts:
See also: computer engineering, electrical engineering, integrated circuit, list of electronics topics, microelectronics, optoelectronics, point-to-point construction, printed circuit board, semiconductor, transducer, wire wrap
Digital circuitsComputers, electronic clockss, and programmable logic controllers (used to control industrial processes) are constructed of digital circuits. Digital Signal Processors are another example.
Mixed-signal circuitsMixed-signal circuits, also known as hybrid circuits, are becoming increasingly common. Mixed circuits contain both analog and digital components. analog to digital converterss and digital to analog converterss are the primary examples. Other examples are transmission gates and buffers.
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