Which of the following types of ADC is also known as continuous conversion type ADC?

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DFCCIL Executive S&T 29 Sept 2021 Official Paper
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  1. Dual-slope ADC
  2. Counter-type ADC
  3. Tracking-type ADC
  4. Successive approximation ADC

Answer (Detailed Solution Below)

Option 4 : Successive approximation ADC
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Detailed Solution

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Concept:

successive-approximation ADC is a type of analog-to-digital converter that converts a continuous analog waveform into a discrete digital representation using a binary search through all possible quantization levels before finally converging upon a digital output for each analog voltage conversion.

For an N-bit successive approximation ADC, the conversion time is

= N T

Where T is the time period of the clock pulse.

∴ The conversion time does not depend on the magnitude of the input voltage.

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