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A linear delta modulator is designed to operate on speech signals limited to 3.4 kHz. The sampling rate is 10 time the Nyquist rate of the speech signal. The step size δ = 0·62 is 100 mV. The modulator is tested with a 1 kHz sinusoidal signal. The maximum amplitude of this test signal required to avoid slope overload is—
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- 2.04 V
- 1.08 V
- 4.08 V
- 2.16 V
Correct Option: B
Condition to avoid slope-overload noise
| ≥ 2πfm.Am | |
| Ts |
| |Am|max = | |
| 2πfm |
| = | |
| 2π3.4 × 103 |
= 1.08V
