Question

This concept of  (A/D conversion and sampling rates) could be relevant to envisioned future career field.

Could you write a paragraph commenting please?

Answer 1

A/D BASICS

in the process of analogue to digital conversion an analogue signal is converted into a digital signal which can be stored in a computer for further processing analogue signals are real world signals for example physiological signals such as electroencephalogram electrooculogram in order for them to be stored and manipulated by a computer these signals must be converted into a discrete digital form the computer can understand using A/D conversion and a computer to analyze data has many advantages over older non computerized methods computer analysis of signals is far more efficient than analysis by hand and paper most importantly real time analysis can be performed this means that signals can be analyzed as they are acquired during the course of an experiment

SAMPLING

Consider the signal shown in figure which is part of an electroencephalogram it is an analogue signal since it is continously changing in time any arbitrarily given value that is within the range of signal can be obtained simply by measuring electrical activity at the right point in time the object of A/D conversion is to convert this signal into a digital representation and this is done by sampling the signal a digital signal is sampled signal obtained by sampling the analogue signal at discreet points in time this points are usually evenly spaced in time with the time between being referred to as the sampling interval

The electronic circuit that carries out the process of sampling the signal and A/D conversion is called analog to digital converter.being an electronic device it requires an electrical signal at its input those the first step in the process of A/D to conversion is to convert the analog non voltage signal into an analog voltage signal.the device that carries out this function is called transducer.for signals which are inherently voltages such as the electrocardiogram from the heart the electrooculogram from the eyes or the electromyogram from muscle transduction is of course not necessary  

FUTURE RESOLUTION:

these analog to digital converters are used in music recording, digital signal processing,scientific instruments,rotary encoders.ADC are used virtually everywhere where an analog signal has to be processed,stored in digital form.when signals are in digital form they are less susceptible to the delecterious effects of additive noise .ADC provides a link between analog world of signal processing and data handling.