- Amplification is simply multiplication of constant called gain with analog signal.
- Filteringdistinguish pure signal from noise.
- Peak detection means detecting the highest peak value for analog signal. it also keeps hold of that value for certain amount of time.
- ADCis process to convert continuous analog signal to discrete numerical value.
Signal Processing by Peter D. Wentzell and Christopher D. Brown explains each of these opearations in detail. Have a look: http://groupwentzell.chemistry.dal.ca/papers/c2.pdf
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