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Analog ElectronicsAnalog Signal Processing

In a sample-and-hold circuit, droop rate refers to?

  • AThe gradual change of held output voltage with time
  • BThe sampling frequency itself
  • CThe instantaneous input resistance only
  • DThe op-amp open-loop gain
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Correct Answer: A. The gradual change of held output voltage with time
Explanation: Leakage currents and finite storage cause the held capacitor voltage to change slowly; this rate is called droop.
Reference: Standard analog electronics: sample-and-hold droop
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