Transcription of INSTRUMENTATION AND CONTROL SYSTEMS
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1 INSTRUMENTATION AND COMPUTER CONTROL SYSTEMS SENSORS AND SIGNAL CONDITIONING Steve Collins Michaelmas Term 2012 Introduction An INSTRUMENTATION system obtains data about a physical system either for the purpose of collecting information about that physical system or for the feedback CONTROL of the physical system Any INSTRUMENTATION system must include an input transducer (sensor), such as a strain gauge, whose response to a particular stimulus can be measured electrically. The other component that is generally present in modern INSTRUMENTATION SYSTEMS is a digital processor, such as a computer or a micro-controller.
Even after an op-amp has been selected that appears to be ideal additional components may be required in a circuit to compensate for other non-ideal aspects of an op-amp’s behaviour. Finally, all op-amps have a gain that reduces at high frequencies. This means that any op-amp will only appear to be ideal for frequencies less than a maximum value.
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