AD/DA conversion

What is the error caused by quantization in AD conversion called?

  1. AAliasing error
  2. BGain error
  3. CQuantization error
Show answer and explanation

Answer: C. Quantization error

Quantization rounds each sampled value to one of a finite number of steps, and the difference from the original value is the quantization error. In an ideal ADC it is at most ±1/2 LSB and becomes smaller as the number of bits increases.

  • A. Aliasing occurs when the sampling frequency is insufficient.
  • B. Gain error is caused by a deviation in the slope of the transfer characteristic.
  • C. Correct. It is the error caused by rounding values.
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More AD/DA conversion questions

  1. What is the sampling frequency of a music CD?
  2. Which correctly describes the integral nonlinearity (INL) of an AD converter?
  3. Which correctly describes the gain error of an AD converter?
  4. What does it mean for a DA converter to be monotonic?
  5. What is the drawback of a binary-weighted resistor DAC, which assigns a different resistor (R, 2R, 4R, ...) to each bit?