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How analog signal can be converted into a digital one?

December 24, 2020 by imBooz Leave a Comment

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Analog signal can be converted into a digital signal:

Ans. The word Analog signal is derived from the word analogue, which is Latin for “proportional”. Analog signals are continuous in both time and amplitude. That is, they represent relatively infinite ranges of values. The voltage level of an analog signal can vary continuously from zero to some maximum value. Digital signals, on the other hand, are discrete in both time and amplitude. That is, they represent only a finite number of values. The voltage level of a digital signal can only take on one of these values at any given instant.

An Analog signal can be converted into a digital signal by following the procedure as shown in the figure below.

Fig. Block diagram of the analog to digital converter

Sampler:

It converts continuous amplitude continuous-time signal into continuous amplitude
discrete-time signal.

Quantizer:

It converts continuous amplitude discrete-time signal into discrete amplitude discrete-time signal. It approximates each sample into its nearest standard voltage level called quantization level. It is a process of rounding‐off the signal.

Encoder:

An encoder converts each quantized sample into a distinct codeword. Thus at the output of the encoder, we get digital code words.

 

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Filed Under: Semiconductor Tagged With: analog to digital converter, Encoder, Quantizer, Sampler

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