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What is redundancy in an electronic system? |
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This refers to building or designing in to the equipment a number of systems that can "take over " if one part of the system fails to work. Some people call that a built-in back up system.
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As in a computer system, you would have 2 drives, both with the same exact information on them. When you write info to the drive or load a program on the one drive it loads it on the other drive. If one of those drives goes bad, all the info will be on the other drive and the system will continue to run. Of course you will want to replace the bad drive and copy good drive info to the new drive so that it is again a redundant system.
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Redundancy in an electronic system means to have components, which are critical in the working of a device, duplicated. This ensures a good amount of reliability in the working of system. So only critical components are duplicated and that too in applications like Space shuttle electronics or any other application whose operation is quite critical in itself.
This makes sure that even if one of the redundant component fails another one will still be working to ensure the operation, however it might degrade performance but wont stop the working.
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Redundancy can also refer to logic systems. This is when two or more logic gates cancel each other out and become unnecessary, for example two NOT gates in a row would be pointless, therefore they are redundant and can be removed. This is a common technique used to reduce the components in a system, and is a technique often applied when doing replacement such as NAND replacement or NOR replacement.
However...
Some designs often feature a few NOT gates in a line, but are not removed. This is not seen very often these days, as it's a bit of a dodgy fix. It is simply used to create a time delay, so a signal doesn't arrive at its destination too quickly.
First answer by Buntingj. Last edit by Jeh506. Contributor trust: 19 [recommend contributor]. Question popularity: 77 [recommend question]
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