One way of looking at an electronic system is to divide it into the following parts: Inputs - Electrical or mechanical sensors (or transducers), which take signals (in the form of temperature, pressure, etc.) from the physical world र convert them into current/voltage signals. Signal processing circuits - These consist of electronic components connected together to manipulate, interpret र transform the signals. Outputs - Actuators or other devices (also transducers) that transform current/voltage signals back into useful physical form. Take as an example a television. 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 र sound information from this signal. The output devices are a cathode ray tube that converts electronic signals into a visible image on a screen, र magnet driven audio speakers.
Posted on: Mon, 11 Aug 2014 08:47:20 +0000
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