Special Purpose Op-Amp Circuits 1 Questions and Answers

Practice Mode
Showing 10 of 59 questions
Q21
A half-wave precision rectifier outputs
  • A Both halves
  • B Only positive half
  • C Only negative half
  • D DC level
Answer: Option B
Explanation: Half-wave rectifiers pass one polarity while blocking the other.
Q22
A full-wave precision rectifier uses
  • A One diode
  • B Two diodes and op-amps
  • C No diodes
  • D Zeners only
Answer: Option B
Explanation: Configurations with two diodes and op-amp stages achieve full-wave rectification.
Q23
A peak detector stores the signal peak on a
  • A Resistor
  • B Inductor
  • C Capacitor
  • D Transformer
Answer: Option C
Explanation: A diode-capacitor network with an op-amp charges and holds the peak value.
Q24
In a sample-and-hold circuit, the hold element is typically a
  • A Resistor
  • B Capacitor
  • C Inductor
  • D Transformer
Answer: Option B
Explanation: The capacitor stores the sampled voltage during the hold period.
Q25
A clamping (DC restorer) circuit shifts the waveform
  • A Frequency
  • B Phase
  • C DC level
  • D Amplitude
Answer: Option C
Explanation: Clampers add or restore a DC offset to fix a reference level.
Q26
A clipper circuit is used to
  • A Integrate signals
  • B Limit amplitude beyond a threshold
  • C Differentiate signals
  • D Demodulate FM
Answer: Option B
Explanation: Clippers prevent signal from exceeding set positive/negative limits.
Q27
A logarithmic amplifier output is proportional to
  • A Input
  • B Square of input
  • C Log of input
  • D Inverse of input
Answer: Option C
Explanation: Using the exponential I-V of a diode or BJT in feedback yields a log relationship.
Q28
An antilog amplifier provides output proportional to
  • A Input
  • B e^(input)
  • C log(input)
  • D 1/input
Answer: Option B
Explanation: Placing the exponential device at the input stage yields antilog behavior.
Q29
A current-to-voltage (transimpedance) amplifier uses feedback
  • A Resistor
  • B Capacitor only
  • C Inductor
  • D Transformer
Answer: Option A
Explanation: The op-amp converts input current to output voltage via a feedback resistor.
Q30
A voltage-to-current (V-I) converter is commonly called
  • A Transconductance amplifier
  • B Transresistance amplifier
  • C Instrumentation amplifier
  • D Chopper amplifier
Answer: Option A
Explanation: It produces an output current proportional to input voltage.

📚 More from Electronics

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
Electronics
Back to Electronics
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test