Special-Purpose Op-Amp Circuits 2 Questions and Answers
Operational amplifiers (Op-Amps) are the building blocks of analog electronics, and understanding special-purpose op-amp circuits is essential for students of Electronics and Communication Engineering. This resource includes special-purpose op-amp circuits questions with answers designed for GATE, BEL, and DRDO aspirants. These aptitude questions and answers with explanations cover applications such as integrators, differentiators, voltage followers, and active filters. Detailed explanations help students link theory with real-world implementation and strengthen their preparation for both academic and competitive technical exams.
Special-Purpose Op-Amp Circuits 2
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30 questions
11. The operational transconductance amplifier (OTA) is primarily a ________ -to- ________ amplifier.
- current, voltage
- voltage, current
- current, resistance
- resistance, current
12. The main difference between the isolation amplifier and an instrumentation amplifier is
- an instrumentation amplifier has an input stage.
- an instrumentation amplifier has an output stage.
- an instrumentation amplifier has a differential stage.
- the input, output, and power supply stages of an isolation amplifier are all electrically isolated from each other.
13. An antilog amplifier has a ________ in series with the input.
- BJT
- diode
- diode or BJT
- resistor
14. A(n) ________ amplifier provides "a barrier" between the input and output for the protection of human life or sensitive equipment.
- instrumentation
- isolation
- operational transconductance
- voltage-to-current
15. Transconductance is the ratio of the output
- current to the input voltage.
- current to the input current.
- voltage to the input voltage.
- voltage to the input current.
16. The OTA has a ________ input impedance and a ________ CMRR.
- high, low
- low, high
- high, high
- low, low
17. The log of a number is the
- base to which the power must be raised to get that number.
- power to which the base must be raised to get that number.
- base of that number.
- power of that number.
18. What is a key characteristic of an instrumentation amplifier?
- high CMRR
- high output offset
- high output impedance
- none of the above
19. In logarithmic signal compression,
- large and small voltages are compressed equally.
- large voltages are compressed more than small voltages
- large voltages are compressed less than smaller voltages.
- none of the above
20. What part of the characteristic curve of a diode is useful for log amplifiers?
- the log region above 0.7 V
- the log region below 0.7 V
- the log region between 0 V and 0.7 V
- the log region below the zener voltage