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Signal Conditioning and processing

 Signal Condiotioning

   It is the modification of transducer output signal int usable format for the final stage of measurement. The signal conditioning system is for passive transducer and amplification system is for active transducer. In both application the transducer's output is brought up to significant level to make it useful for conversion, processing,indicating and recording.

Excitation is needed for passive transducer because they do not generate their own voltage or current. so passive transducers like potentiometer, inductive and capacitive transducer requires excitation from external source.
 In active transducer like thermocouple, piezoelectric crystal doesn't require external source of excitation since they produce their own electrical signal on account of application of the physical quantities
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