Discussion
Match the List-I with List-II and select the correct answer using the codes given below :
| List-I | List-II |
|---|---|
| (a) Flash ADC | (i) Music synthesiser |
| (b) Dual slope ADC | (ii) DMM |
| (c) Successive Approximation ADC | (iii) Digital Camera |
| (d) DAC | (iv) Speech digitisation |
Answer: C
The correct code is (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i).
A flash ADC is the fastest converter, so it suits high-speed applications such as a digital camera (iii). A dual-slope ADC is slow but very accurate and rejects mains noise, which is why digital multimeters use it (ii). A successive approximation ADC offers moderate speed and resolution, suitable for speech digitisation (iv). A DAC turns digital samples back into an analogue signal, as in a music synthesiser (i).
The other codes give the dual-slope converter to speech or a synthesiser, where its slowness would be a handicap, or misplace the DAC.
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