Topic: Communication Systems
In an ADC, the minimum Effective Number of Bits (ENOB) requires to represent each quantization level to achieve Signal to Noise and Distortion Ratio (SINAD) of 70 dB is
- A. 8 bits
- B. 10 bits
- C. 11 bits
- D. 12 bits
Answer: D. 12 bits
Explanation: SNR required = 70 dB.
$SNR \le 1.8+6m$ dB.
$70 \le 1.8+6m$ dB.
$m=11.36$ bits $\approx$ 12 bits.