AD/DA conversion

What is the AD converter defect called in which a certain output code never appears no matter how the input changes?

  1. AMissing code
  2. BAliasing
  3. CGlitch
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Answer: A. Missing code

A code with a DNL of −1 LSB or less has no corresponding input width and never appears at the output. This is a missing code. In control systems, non-monotonic outputs are a problem, so the absence of missing codes is sometimes guaranteed in the specifications.

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More AD/DA conversion questions

  1. Which is a characteristic of the current-steering architecture often used in high-speed DA converters?
  2. Which metric converts the performance of a real AD converter, including noise and distortion, into the bit count of an ideal ADC?
  3. Which AD converter splits conversion into several stages processed like an assembly line, combining high speed with medium to high resolution?
  4. With simple oversampling and no noise shaping, how much does quantization noise improve when the sampling frequency is quadrupled?
  5. Why does timing fluctuation (jitter) of the sampling clock become a problem when converting high-frequency signals?