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Electronic Devices & CircuitsOperational Amplifiers

A Schmitt-trigger comparator intentionally uses positive feedback mainly to introduce?

  • AHysteresis with two switching thresholds
  • BInfinite input current
  • CA fixed 180-degree phase shift at all frequencies
  • DFull-wave rectification
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Correct Answer: A. Hysteresis with two switching thresholds
Explanation: Positive feedback creates separate upper and lower switching thresholds, improving noise immunity around the transition level.
Reference: Standard analog electronics: Schmitt trigger
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