By Ward S
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Additional info for Electrical Engineering
For example, a thermocouple might be used to help ensure a furnace’s temperature remains constant. For this reason, instrumentation engineering is often viewed as the counterpart of control engineering. Computers Computer engineering Computer engineering deals with the design of computers and computer systems. This may involve the design of new hardware, the design of PDAs or the use of computers to control an industrial plant. Computer engineers may also work on a system’s software. However, the design of complex software systems is often the domain of software engineering, which is usually considered a separate discipline.
Properties of digital circuits Digital circuits are distinct from analog circuits. In analog circuits, quantities are represented by continuously varying voltages, currents, or frequencies. The usual advantages of digital circuits when compared to analog circuits are: • • • Digital circuits are less affected by noise. In fact, if the noise is below a certain level (the noise margin), a digital circuit behaves as if there was no noise at all — this is a necessary and sufficient property for a circuit to be considered a digital circuit.
Therefore, in small volume products, programmable logic devices are often the preferred solution. They are usually designed by engineers using electronic design automation software (See below for more information). When the volumes are medium to large, and the logic can be slow, or involves complex algorithms or sequences, often a small microcontroller is programmed to make an embedded system. These are usually programmed by software engineers. When only one digital circuit is needed, and its design is totally customized, as for a factory production line controller, the conventional solution is a programmable logic controller, or PLC.
Electrical Engineering by Ward S