RC Coupled Transistor Amplifier Operation

Question 1

In a three-stage RC coupled amplifier circuit, what is the calculated total voltage gain assumed to be?

10
100
1000
10000

Answer 1

1000

Question 2

What components cause the gain of RC coupled amplifiers to decrease when the input frequency increases?

Q1, Q2, Q3
C1, C3, C5, C7
R4, R8, R12
R3, R7, R11

Answer 2

Q1, Q2, Q3

Question 3

In a three-stage RC coupled amplifier circuit with a total gain of 750, the next step to verify normal operation is _______.

none, the circuit is operating normally
none, the circuit is not operating normally
to calculate and measure individual stage gains
to observe the input signal for frequency and amplitude

Answer 3

to calculate and measure individual stage gains

Question 4

Clipping occurs in RC coupled amplifiers when the input _______.

voltage is low
frequency is low
frequency is high
amplitude drives a transistor into cutoff or saturation

Answer 4

amplitude drives a transistor into cutoff or saturation

Question 5

In RC coupled amplifiers, normal operation is verified by comparing measured and calculated _______.

total circuit voltage gain
individual stage voltage gain
input signal frequency and amplitude
sum of individual stage voltage gains

Answer 5

total circuit voltage gain

Question 6

In an RC coupled amplifier, what can cause this type of output signal?

Low frequency input
High frequency input
Q2 in cutoff
Q2 in saturation

Answer 6

Q2 in cutoff

Question 7

Is this RC coupled amplifier circuit operating normally?

No, the gain is high.
Yes
No, the output signal is distorted.
No, the gain is low and the output is not in phase.

Answer 7

No, the output signal is distorted.

Question 8

Is this RC coupled amplifier circuit operating normally?

No, the gain is high.
Yes
No, the output signal is distorted.
Can’t be determined until individual gains are calculated.

Answer 8

Can’t be determined until individual gains are calculated.

Question 9

In this RC coupled amplifier, what is the product of Q1 and Q2’s voltage gains?

51
15
10
3

Answer 9

51

Question 10

Is this RC coupled amplifier circuit operating normally?

No, the gain is high.
Yes
No, the output signal is distorted.
No, the gain is low.

Answer 10

No, the gain is low.

Question 11

For calculating the collector load of Q2, which resistances are used?

R5, R6
R7, R9, R10
R5, R6, R7, R9
R6, R7, R9, R10

Answer 11

R7, R9, R10

Question 12

For calculating the collector load of Q1, which resistance(s) are used?

R3
R3 and Xc3
R3, Xc3, R5
R3, R5, and R6

Answer 12

R3, R5, and R6

Question 13

In a three-stage RC coupled amplifier with a total gain of 1100, where each stage has a calculated gain of 10, what is the next step to verify normal operation?

None, the circuit is operating normally.
None, the circuit is not operating normally.
Calculate and measure individual stage gains.
Observe the input signal for frequency and amplitude.

Answer 13

None, the circuit is operating normally.

Question 14

Is this RC coupled amplifier circuit operating normally?

No, the gain is high.
Yes
No, the output signal is distorted.
No, the gain is low.

Answer 14

No, the gain is low.

Question 15

Is this RC coupled amplifier circuit operating normally?

No, the gain is low and the output is not in phase.
No, the output signal is distorted.
No, the gain is high.
Yes

Answer 15

Yes

Question 16

When the input signal is at a low frequency, what causes the gain of RC coupled amplifiers to decrease?

The transistors’ ability to amplify the low frequency signal.
Decreasing the capacitive reactances of the coupling capacitors.
Increasing the capacitive reactances of the coupling capacitors.
Emitter bypass capacitors that short signals to ground.

Answer 16

Increasing the capacitive reactances of the coupling capacitors.