Electronic systems and circuits Electronic components Analog circuits Information and analog signals Noise Analog integrated circuit Disadvantages of analog systems Electronics at work Electronics hystory Electronics types Electronics in the house Electronics devices

Electronic systems and circuits

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Electronic 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

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 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

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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 more usually called 'devices' as opposed to components

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An electronic component is a basic electronic building block packaged in a discrete form with two or more connecting leads or metallic pads. The 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).

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Links Electronics Electronic systems and circuits Electronic components Analog circuits Information and analog signals Noise Analog integrated circuit Disadvantages of analog systems Electronics at work Electronics hystory Electronics types Electronics in the house Electronics devices