Question

Signal to noise ratio is infinite when

(a) Quantization noise is zero

(b) Number of levels are infinite

(c) Quantization noise is zero & Number of levels are infinite

(d) None of the mentioned

I have been asked this question by my college professor while I was bunking the class.

My question is taken from Sources of Corruption topic in portion Formatting and Baseband Modulation of Digital Communications

Answer 1

The correct option is (c) Quantization noise is zero & Number of levels are infinite

To elaborate: In the limit L tends to infinity and signal to quantization noise ratio tends to infinity when quantization levels are infinite and quantization noise is zero.