This set of Electronic Devices and Circuits Multiple Choice Questions & Answers (MCQs) focuses on “High-Frequency Response of the Emitter Followers”.
1. What type of amplifier is a high frequency response of emitter follower amplifier?
a) Voltage amplifier
b) Wideband amplifier
c) Feedback amplifier
d) Power amplifier
View Answer
Explanation: The high frequency response of emitter follower amplifier is one of the most noticeable feedback amplifiers. It provides a negative current feedback to the circuit. These type of amplifiers are usually used in the end stage or the last stage of a series of amplifiers.
2. How is the input impedance of a high frequency response of emitter follower amplifier?
a) Irrelevant
b) Moderate
c) Low
d) High
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Explanation: The construction of a high frequency response of emitter follower circuit is approximately similar to a normal amplifier. One of the most important differentiating feature of a high frequency response of emitter follower circuit is its high input impedance.
3. How is the output impedance of a high frequency response of emitter follower amplifier?
a) Irrelevant
b) Moderate
c) Low
d) High
View Answer
Explanation: The structure of a high frequency response of emitter follower circuit is roughly comparable to a normal amplifier. The low output impedance is one of the most prominent differentiating feature of a high frequency response of emitter follower circuit.
4. How is the current gain of a high frequency response of emitter follower amplifier?
a) Irrelevant
b) Moderate
c) Low
d) High
View Answer
Explanation: The construction of a high frequency response of emitter follower amplifier circuit is almost similar to an ordered feedback amplifier. Nonetheless, one of the most striking differentiating feature of a current gain with resistive load circuit is its high current gain.
5. How is the power gain of a high frequency response of emitter follower amplifier?
a) Irrelevant
b) Moderate
c) Low
d) High
View Answer
Explanation: One of the most significant difference between a normal amplifier and of a high frequency response of emitter follower amplifier circuit is its high power gain. The construction of a high frequency response of emitter follower amplifier circuit is approximately similar to a normal amplifier, however the resistive load provides high power gain.
6. What is the application of a high frequency response of emitter follower amplifier?
a) Positive feedback
b) Voltage gain
c) Power gain
d) Impedance matching
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Explanation: The high input impedance along with low output impedance makes the high frequency response of emitter follower amplifier ideal for impedance matching. Along with that, its key characteristics include a comparatively high current and power gain.
7. What type of negative feedback does the high frequency response of emitter follower amplifier provide?
a) Voltage, current and power
b) Voltage
c) Current
d) Power
View Answer
Explanation: The high frequency response of emitter follower configuration is prominently known for its feedback amplifier qualities. It is a negative feedback network that provides a negative feedback of current to the circuit. It is generally used in the last stage of an amplifying network.
8. What is the value of β in a high frequency response of emitter follower amplifier if Vf = 12V and VO = 12V?
a) 1
b) 124
c) 1.24
d) 0.124
View Answer
Explanation: The value of β in a high frequency response of emitter follower amplifier configuration can be calculated using β = Vf / VO. Given, Vf = 12V and VO = 12V:
β = Vf / VO = 12 / 12 = 1.
9. What is the voltage gain of a high frequency response of emitter follower amplifier?
a) 1
b) β
c) ∞
d) 0
View Answer
Explanation: The voltage gain of a high frequency response of emitter follower amplifier configuration is roughly equal to unity. AV is approximately equal to 1. This is due to the relatively high input impedance and low output impedance.
10. What is the other name for a high frequency response of emitter follower amplifier configuration?
a) Common collector
b) Common base
c) Common emitter
d) Amplifier circuit
View Answer
Explanation: The high frequency response of emitter follower circuit configuration is also known as the common collector configuration as it provides a high input impedance and a low output impedance. The high frequency response of emitter follower circuit acts as a buffer stage, and in result is used in several circuits where there is a need to prevent the loading of a circuit.
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