Floyd Self-test Chapter 10 Topic Outline
- Floyd Self-test in Basic Concepts of Amplifier Frequency Response
- Floyd Self-test in The Decibel
- Floyd Self-test in Low-Frequency Amplifier Response
- Floyd Self-test in High-Frequency Amplifier Response
- Floyd Self-test in Total Amplifier Frequency Response
- Floyd Self-test in Frequency Response of Multistage Amplifiers
- Floyd Self-test in Frequency Response Measurements
Start Practice Exam Test Questions
Choose the letter of the best answer in each questions.
1. The low-frequency response of an amplifier is determined in part by
- (a) the voltage gain
- (b) the type of transistor
- (c) the supply voltage
- (d) the coupling capacitors
2. The high-frequency response of an amplifier is determined in part by
- (a) the gain-bandwidth product
- (b) the bypass capacitor
- (c) the internal transistor capacitances
- (d) the roll-off
3. The Miller input capacitance of an amplifier is dependent, in part, on
- (a) the input coupling capacitor
- (b) the voltage gain
- (c) the bypass capacitor
- (d) none of these
4. The decibel is used to express
- (a) power gain
- (b) voltage gain
- (c) attenuation
- (d) all of these
5. When the voltage gain is 70.7% of its midrange value, it is said to be
- (a) attenuated
- (b) down 6 dB
- (c) down 3 dB
- (d) down 1 dB
6. In an amplifier, the gain that occurs between the lower and upper critical frequencies is called the
- (a) critical gain
- (b) midrange gain
- (c) bandwidth gain
- (d) decibel gain
7. A certain amplifier has a voltage gain of 100 at midrange. If the gain decreases by 6 dB, it is equal to
- (a) 50
- (b) 70.7
- (c) 0
- (d) 20
8. The gain of a certain amplifier decreases by 6 dB when the frequency is reduced from 1 kHz to 10 Hz. The roll-off is
- (a) -3dB/decade
- (b) -6dB/decade
- (c) -3dB/octave
- (d) -6dB/octave
9. The gain of a particular amplifier at a given frequency decreases by 6 dB when the frequency is doubled. The roll-off is
- (a) -12dB/decade
- (b) -20dB/decade
- (c) -6dB/octave
- (d) answers (b) and (c)
10. The lower critical frequency of a direct-coupled amplifier with no bypass capacitor is
- (a) variable
- (b) 0 Hz
- (c) dependent on the bias
- (d) none of these
11. At the upper critical frequency, the peak output voltage of a certain amplifier is 10 V. The peak voltage in the midrange of the amplifier is
- (a) 7.07 V
- (b) 6.37 V
- (c) 14.14 V
- (d) 10 V
12. The high-frequency response of an amplifier is determined by the
- (a) coupling capacitors
- (b) bias circuit
- (c) transistor capacitances
- (d) all of these
13. The Miller input and output capacitances for a BJT inverting amplifier depend on
- (a) Cbc
- (b) βac
- (c) Av
- (d) answers (a) and (c)
14. The bandwidth of an amplifier is determined by
- (a) the midrange gain
- (b) the critical frequencies
- (c) the roll-off rate
- (d) the input capacitance
15. An amplifier has the following critical frequencies: 1.2 kHz, 950 Hz, 8 kHz, and 8.5 kHz. The bandwidth is
- (a) 7550 Hz
- (b) 7300 Hz
- (c) 6800 Hz
- (d) 7050 Hz
16. Ideally, the midrange gain of an amplifier
- (a) increases with frequency
- (b) decreases with frequency
- (c) remains constant with frequency
- (d) depends on the coupling capacitors
17. The frequency at which an amplifier’s gain is 1 is called the
- (a) unity-gain frequency
- (b) midrange frequency
- (c) corner frequency
- (d) break frequency
18. When the voltage gain of an amplifier is increased, the bandwidth
- (a) is not affected
- (b) increases
- (c) decreases
- (d) becomes distorted
19. If the fT of the transistor used in a certain amplifier is 75 MHz and the bandwidth is 10 MHz, the voltage gain must be
- (a) 750
- (b) 7.5
- (c) 10
- (d) 1
20. In the midrange of an amplifier’s bandwidth, the peak output voltage is 6 V. At the lower critical frequency, the peak output voltage is
- (a) 3 V
- (b) 3.82 V
- (c) 8.48 V
- (d) 4.24 V
21. The dominant lower critical frequency of a multistage amplifier is the
- (a) lowest fcl
- (b) highest fcl
- (c) average of all the fcl’s
- (d) none of these
22. When the critical frequencies of all of the stages are the same, the dominant critical frequency is
- (a) higher than any individual fcl
- (b) lower than any individual fcl
- (c) equal to the individual fcl’s
- (d) the sum of all individual fcl’s
23. In the step response of a noninverting amplifier, a longer rise time means
- (a) a narrower bandwidth
- (b) a lower fcl
- (c) a higher fcu
- (d) answers (a) and (b)
Post a Comment