Amplifier Frequency Response Questions and Answers

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Showing 10 of 21 questions
Q11
An RC network has a roll-off of 20 dB per decade. What is the total attenuation between the output voltage in the midrange of the passband as compared to the output voltage at a frequency of 10 times fc?
  • A –3 dB
  • B –20 dB
  • C –23 dB
  • D –43 dB
Answer: Option B
Q12
It is often convenient in amplifiers to assign a certain value of gain as the ________ dB reference.
  • A 0
  • B 1
  • C 6
  • D 10
Answer: Option A
Q13
For low-frequency response, all RC circuits in an amplifier may not have the same critical frequency. Which RC response will determine the critical frequency of the amplifier?
  • A the lowest frequency
  • B the center frequency
  • C the highest frequency
  • D the bypass frequency
Answer: Option C
Q14
A ten-times change in frequency is called a(n)
  • A octave.
  • B decade.
  • C decimal.
  • D none of the above
Answer: Option B
Q15
An amplifier has an output voltage of 7.6 V p-p at the midpoint of the frequency range. What is the output at fc?
  • A 3.8 V p-p
  • B 3.8 Vrms
  • C 5.4 Vrms
  • D 5.4 V p-p
Answer: Option D
Q16
The frequency response of an amplifier can be determined using the step response method, and measuring the output rise/fall times between
  • A 0% and 100% response.
  • B 10% and 90% response.
  • C 25% and 75% response.
  • D five time constant responses.
Answer: Option B
Q17
In a multistage amplifier, the overall frequency response is determined by the
  • A frequency response of each stage depending on the relationships of the critical frequencies.
  • B frequency response of the first amplifier.
  • C frequency response of the last amplifier.
  • D lower critical frequency of the first amplifier and the upper critical frequency of the final amplifier.
Answer: Option A
Q18
What term means that the midrange voltage gain is assigned a value of 1 (or 0 dB)?
  • A critical
  • B Miller
  • C normalized
  • D corner
Answer: Option C
Q19
An RC network has values of R = 1.2 k and C = 0.22 F. Find fc.
  • A 3.79 kHz
  • B 1.89 kHz
  • C 603 Hz
  • D 60 Hz
Answer: Option C
Q20
Halving the power corresponds to a ________ dB ________.
  • A 3, decrease
  • B 10, decrease
  • C 3, increase
  • D 10, increase
Answer: Option A

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