What is the need for a quantizer in Digital Communications?(a) Break up a sampled signal to a finite dataset(b) Sample a pure analog signal(c) Sample a digital signal(d) Encode an analog signalI have been asked this question in an interview for job.Origin of the question is Digital Input Output topic in division Arduino Programming of Arduino

What is the need for a quantizer in Digital Communications?(a) Break u

1.	What is the need for a quantizer in Digital Communications?(a) Break up a sampled signal to a finite dataset(b) Sample a pure analog signal(c) Sample a digital signal(d) Encode an analog signalI have been asked this question in an interview for job.Origin of the question is Digital Input Output topic in division Arduino Programming of Arduino
Answer» Right option is (a) Break up a SAMPLED signal to a finite dataset The explanation: The ADC (Analog to Digital Convertor) CIRCUIT converts the pure analog signal to a digitized signal with discrete VOLTAGE points. However, in order to be able to perform further complicated computations on the data, we need to convert the discrete signal into a set of finite data points. This is done by mapping the values to a set of POSITIVE real INTEGERS.

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