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Question

If the number of bits in a PCM system is increased from n to n + 1, the signal to quantization noise ratio will increase by a factor of

A
(n+1)2n
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B
2
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C
(n+1)n
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D
4
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Solution

The correct option is D 4
(SNR)2(2n)2
(SNR)2(SNR)1=(2n+1)2((2n)2)=4

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