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Analog ElectronicsOperational Amplifiers

An op-amp’s input common-mode voltage range specifies the range over which?

  • ABoth input voltages may move together while the input stage operates properly
  • BThe output must always equal zero
  • CThe supply current becomes infinite
  • DThe feedback factor is exactly one
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Correct Answer: A. Both input voltages may move together while the input stage operates properly
Explanation: The common-mode input range defines allowable common movement of the input terminals while maintaining proper input-stage operation.
Reference: Standard analog electronics: input common-mode range
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