Amplifier Frequency Response - General Questions Online Exam Quiz
Amplifier Frequency Response - General Questions GK Quiz. Question and Answers related to Amplifier Frequency Response - General Questions. MCQ (Multiple Choice Questions with answers about Amplifier Frequency Response - General Questions
Doubling the voltage gain causes a ________ dB ________.
A : 10, increase
B : 6, increase
C : 10, decrease
D : 6, decrease
________ frequencies are values of frequency at which the RC circuits reduce the voltage gain to 70.7% of its midrange value.
A : Critical
B : Cutoff
C : Corner
D : all of the above
A roll-off of 20 dB per decade is equivalent to a roll-off of ________ per octave.
A : 3 dB
B : 13 dB
C : 12 dB
D : 6 dB
An amplifier has an R in = 1.2 k . The coupling capacitor is 1 F. Determine the approximate lower cutoff frequency.
A : 133 Hz
B : 1.33 kHz
C : 13.3 kHz
D : 133 kHz
Refer to this figure. The output voltage at f cl = 12 mV. What is the output voltage at the midpoint frequency?
A : 12 mV
B : 12 mV p-p
C : 16.97 mV
D : 8.48 mV
Each RC circuit causes the gain to drop at a rate of ________ dB/decade.
A : 20
B : 10
C : 6
D : none of the above
The phase shift through the input of an RC circuit approaches ________° as the frequency approaches zero.
A : 0
B : 45
C : 180
D : 90
A certain amplifier has a bandwidth of 22.5 kHz with a lower cutoff frequency of 600 Hz. What is the value of f cu ?
A : 600 Hz
B : 22.5 kHz
C : 23.1 kHz
D : 21.9 kHz
Internal transistor junction capacitances affect the high-frequency response of amplifiers by
A : reducing the amplifier's gain.
B : introducing phase shift as the signal frequency increases.
C : having no effect.
D : reducing the amplifier's gain and introducing phase shift as the signal frequency increases.
What is the method that can be used to determine the values of f cl and f cu of an amplifier?
A : five time constants
B : step-response
C : sinusoidal
D : -
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