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For a given sample-and-hold circuit, if the value of the hold capacitor is increased, then
  • a)
    droop rate decreases and acquisition time decreases
  • b)
    droop rate decreases and acquisition time increases
  • c)
    droop rate increases and acquisition time decreases
  • d)
    droop rate increases and acquisition time increases
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
For a given sample-and-hold circuit, if the value of the hold capacito...
Concepts:
Generally, a sample & hold circuit is designed using an opamp. The given circuit shows the general implementation:

Sample & Hold circuit capacitor CH is charged by the Amplifier A1.
The maximum output current of the opamp is given as:
 
Droop rate  when V0 is the voltage at the steady state.
The acquisition time (tac) is depicted in the following figure:
Analylsis:

 
If C­H increases then ‘t’ which is the acquiring time must also increase to maintain the relationship.
Also, capacitor discharging time constant TC(discharge) is proportional to capacitance i.e.

So if CH increases then capacitor voltage decreases slowly because of discharging time constant, this means droop rate decreases.
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For a given sample-and-hold circuit, if the value of the hold capacitor is increased, thena)droop rate decreases and acquisition time decreasesb)droop rate decreases and acquisition time increasesc)droop rate increases and acquisition time decreasesd)droop rate increases and acquisition time increasesCorrect answer is option 'B'. Can you explain this answer?
Question Description
For a given sample-and-hold circuit, if the value of the hold capacitor is increased, thena)droop rate decreases and acquisition time decreasesb)droop rate decreases and acquisition time increasesc)droop rate increases and acquisition time decreasesd)droop rate increases and acquisition time increasesCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about For a given sample-and-hold circuit, if the value of the hold capacitor is increased, thena)droop rate decreases and acquisition time decreasesb)droop rate decreases and acquisition time increasesc)droop rate increases and acquisition time decreasesd)droop rate increases and acquisition time increasesCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For a given sample-and-hold circuit, if the value of the hold capacitor is increased, thena)droop rate decreases and acquisition time decreasesb)droop rate decreases and acquisition time increasesc)droop rate increases and acquisition time decreasesd)droop rate increases and acquisition time increasesCorrect answer is option 'B'. Can you explain this answer?.
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