Electronic Devices-Operational Amplifiers
Electronic Devices-Operational Amplifiers
21. In which of the following operations is the resulting output signal of the differential amplifier near zero?
- Single-ended
- Double-ended
- Common-mode
- None of the above
23. Negative feedback added to an op-amp ________ the bandwidth and ________ the gain.
- increases, increases
- increases, decreases
- decreases, decreases
- decreases, increases
24. What is the scale multiplier (factor) of a basic integrator?
- R / C
- C / R
- –RC
- –1 / RC
25. Which of the following circuits is referred to as a BiMOS circuit?
- Bipolar and FET
- Bipolar and MOSFET
- Opposite-type MOSFETs
- None of the above
26. In the differential amplifier circuit, which of the following terminals are connected together?
- Bases
- Collectors
- One base to another collector
- Emitters
27. What is the cutoff frequency of an op-amp if the unity-gain frequency is 1.5 MHz and the open-loop gain is 100,000?
- 5 Hz
- 10 Hz
- 15 Hz
- 20 Hz
28. The ________ is the voltage gain of an op-amp with external feedback.
- Aol
- Acl
- Av
- [NIL]
29. A(n) ________ amplifier configuration has an input impedance approximately equal to the input resistor Ri and an output impedance approximately equal to the output impedance of the op-amp itself.
- non-inverting
- inverting
- voltage-follower
- [NIL]
30. What is the difference voltage if the inputs are an ideal in-phase signal?
- The differential gain times twice the input signal.
- The differential gain times the input signal.
- The common-mode gain times twice the input signal.
- The common-mode gain times the input signal.