How many different input levels can be encoded by an analog-to-digital converter with 8-bit resolution?
8
8 multiplied by the gain of the input amplifier
256 divided by the gain of the input amplifier
256✓الإجابة الصحيحة
الشرح
Each additional bit doubles the number of distinguishable codes, so 8 bits give 2⁸ = 256 distinct input levels. The count depends only on the word length; an input amplifier's gain sets what voltage span is mapped onto those levels, not how many levels exist.