Discussion
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- Question
If the value of resistor Rf in an averaging amplifier circuit is equal to the value of one input resistor divided by the number of inputs, the output will be equal to
Options- A. the average of the individual inputs
- B. the inverted sum of the individual inputs
- C. the sum of the individual inputs
- D. the inverted average of the individual inputs
- Correct Answer
- the inverted average of the individual inputs
- 1. The center frequency of a band-pass filter is always equal to the
Options- A. bandwidth
- B. ?3 dB frequency
- C. bandwidth divided by Q
- D. geometric average of the critical frequencies Discuss
- 2. The formula
shows that for a given capacitor, if the voltage changes at a constant rate with respect to time, the current will
Options- A. increase
- B. decrease
- C. be constant
- D. decrease logarithmically Discuss
- 3. A zero-level detector is a
Options- A. comparator with a sine-wave output
- B. comparator with a trip point referenced to zero
- C. peak detector
- D. limiter Discuss
- 4. If the input to a comparator is a sine wave, the output is a
Options- A. ramp voltage
- B. sine wave
- C. rectangular wave
- D. sawtooth wave Discuss
- 5. Initially, the closed-loop gain (Acl) of a Wien-bridge oscillator should be
Options- A. Acl < 3
- B. Acl > 3
- C. 0
- D. Acl ≅ 1 Discuss
- 6. A comparator is an example of a(n)
Options- A. active filter
- B. current source
- C. linear circuit
- D. nonlinear circuit Discuss
- 7. A digital-to-analog converter is an application of the
Options- A. scaling adder
- B. voltage-to-current converter
- C. noninverting amplifier
- D. adjustable bandwidth circuit Discuss
- 8. The ramp voltage at the output of an op-amp integrator
Options- A. increases or decreases at a linear rate
- B. increases or decreases exponentially
- C. is always increasing and never decreasing
- D. is constant Discuss
- 9. In an averaging amplifier, the input resistances are
Options- A. equal to the feedback resistance
- B. less than the feedback resistance
- C. greater than the feedback resistance
- D. unequal Discuss
- 10. A basic series regulator has
Options- A. an error detector
- B. a load
- C. a reference voltage
- D. both an error detector and a reference voltage Discuss
Basic Op-Amp Circuits problems
Search Results
Correct Answer: geometric average of the critical frequencies
Correct Answer: be constant
Correct Answer: comparator with a trip point referenced to zero
Correct Answer: rectangular wave
Correct Answer: Acl > 3
Correct Answer: nonlinear circuit
Correct Answer: scaling adder
Correct Answer: increases or decreases at a linear rate
Correct Answer: greater than the feedback resistance
Correct Answer: both an error detector and a reference voltage
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