Explain quantizing analog signals, Electrical Engineering

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Explain Quantizing Analog Signals?

A common analog-to-digital conversion pipeline contains a spectrum limiter (a simple low-pass or bandpass filter), a sample and hold circuit, a quantizer, and a digitizer. Quantization inevitably introduces errors, although errors can be decreased by:

a) Increasing the number of quantization levels

b) Introducing non-uniform quantization

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