Question 1

The capacitor that determines the dominant lower cutoff frequency is

Accepted Answer

A) whichever capacitor has the highest fcl 
B) the input coupling capacitor 
C) the bypass capacitor 
D) the internal transistor capacitance 
A) whichever capacitor has the highest fcl 
B) the input coupling capacitor 
C) the bypass capacitor 
D) the internal transistor capacitance A

Question 2

The parasitic base- collector capacitance of a CE or CS amplifier affects

Accepted Answer

A) only the low- frequency response 
B) only the high- frequency response 
C) both A and B 
D) none of the above 
A) only the low- frequency response 
B) only the high- frequency response 
C) both A and B 
D) none of the above B

Question 3

At the midrange frequency of an inverting amplifier, the phase shift is 180°.

Accepted Answer

A) True 
 B)False  True

Question 4

The Miller effect lowers the high- frequency response of inverting amplifiers.

Accepted Answer

A) True 
 B)False

Question 5

Figure 1 Assume rS1U1B1eS1U1B0' = 15 ▲.
-Refer to Figure 1. If the RE1 is changed to a 33 ▲ resistor, the upper cutoff frequency

Accepted Answer

A) increases 
B) decreases 
C) is unaffected 
A) increases 
B) decreases 
C) is unaffected

Question 6

Figure 3
-Refer to Figure 3. Assume the unloaded gain of the amplifier is 10. The ac equivalent Thevenin circuit looking back to the drain from C2 is

Accepted Answer

A) Vth = 50 mV; Rth =5.0 k▲ 
B) Vth = 100 mV; Rth =5.0 k▲ 
C) Vth = 100 mV; Rth =10 k▲ 
D) Vth = 50 mV; Rth =10 k▲ 
A) Vth = 50 mV; Rth =5.0 k▲ 
B) Vth = 100 mV; Rth =5.0 k▲ 
C) Vth = 100 mV; Rth =10 k▲ 
D) Vth = 50 mV; Rth =10 k▲

Question 7

Figure 4 Response of an amplifier
-Refer to Figure 4. The amplifier's frequency response indicates the midrange gain is 33.6 dB. Expressed as regular gain, this is approximately

Accepted Answer

A) 31 
B) 70 
C) 24 
D) 48 
A) 31 
B) 70 
C) 24 
D) 48

Question 8

Figure 2 IS1U1B1GSS S1U1B0(max)= 100 pA. VS1U1B1GS S1U1B0= -2.4 V
-Refer to Figure 2. Assume RS is the only resistance "seen" by C2. The value of C2 that has a lower cutoff frequency of approximately 20 Hz is

Accepted Answer

A) 5.0 µF 
B) 50 µF 
C) 22 µF 
D) 1.0 µF 
A) 5.0 µF 
B) 50 µF 
C) 22 µF 
D) 1.0 µF

Question 9

If a voltage gain of an amplifier is halved it represents a drop of

Accepted Answer

A) -3 dB 
B) -6 dB 
C) 0 dB 
D) -10 dB 
A) -3 dB 
B) -6 dB 
C) 0 dB 
D) -10 dB

Question 10

The bandwidth of an amplifier is determined by the

Accepted Answer

A) the roll- off rates of the upper and lower responses 
B) dominant upper and lower cutoff frequencies 
C) both A and B 
D) the number of physical capacitors in the circuit 
A) the roll- off rates of the upper and lower responses 
B) dominant upper and lower cutoff frequencies 
C) both A and B 
D) the number of physical capacitors in the circuit

Question 11

Figure 4 Response of an amplifier
-Refer to Figure 4. The Bode plotter is a computer tool that

Accepted Answer

A) shows amplitude as a function of frequency 
B) shows amplitude as a function of time 
C) both A and B 
D) none of the above 
A) shows amplitude as a function of frequency 
B) shows amplitude as a function of time 
C) both A and B 
D) none of the above

Question 12

Assume an amplifier has a midrange voltage gain of 22. Expressed in dB, this is

Accepted Answer

A) 40.3 
B) 26.8 dB 
C) 13.4 dB 
D) none of the above 
A) 40.3 
B) 26.8 dB 
C) 13.4 dB 
D) none of the above

Question 13

Figure 3
-Refer to Figure 3. The value of C2 that will result in a lower cutoff frequency of 40 Hz is

Accepted Answer

A) 0.4 µF 
B) 0.2 µF 
C) 0.8 µF 
D) 2.0 µF 
A) 0.4 µF 
B) 0.2 µF 
C) 0.8 µF 
D) 2.0 µF

Question 14

A step- response measurement can be used to test either the high- or the low- frequency response of an amplifier.

Accepted Answer

A) True 
 B)False

Question 15

If an amplifier has a single break frequency at the high- end of the response curve, the gain- bandwidth product for any gain c1 is equal to

Accepted Answer

A) 20 
B) fcu 
C) 1 
D) fT 
A) 20 
B) fcu 
C) 1 
D) fT

Question 16

Assume the output of an amplifier is measured in midrange as 1.5 Vpp. The output at cutoff is

Accepted Answer

A) 0.75 Vpp 
B) 1.06 Vpp 
C) 0.5 Vpp 
D) none of the above 
A) 0.75 Vpp 
B) 1.06 Vpp 
C) 0.5 Vpp 
D) none of the above

Question 17

If an amplifier has a single break frequency at the low- end of the response curve, the roll- off rate is

Accepted Answer

A) -40 dB/decade 
B) -10 dB/decade 
C) -20 dB/decade 
D) -60 dB/decade 
A) -40 dB/decade 
B) -10 dB/decade 
C) -20 dB/decade 
D) -60 dB/decade

Question 18

The midrange output of a CS amplifier with a sine wave input is phase shifted by

Accepted Answer

A) 90° 
B) 180° 
C) 0° 
D) none of the above 
A) 90° 
B) 180° 
C) 0° 
D) none of the above

Question 19

If Vout at the lower cutoff frequency is 1.0 V, the midrange output is 0.707 V.

Accepted Answer

A) True 
 B)False

Question 20

The critical frequency of an amplifier is specified at a power gain of

Accepted Answer

A) -10 dB 
B) 0 dB 
C) -3 dB 
D) -6 dB 
A) -10 dB 
B) 0 dB 
C) -3 dB 
D) -6 dB

The capacitor that determines the dominant lower cutoff frequency is

The parasitic base- collector capacitance of a CE or CS amplifier affects

At the midrange frequency of an inverting amplifier, the phase shift is 180°.

The Miller effect lowers the high- frequency response of inverting amplifiers.

Figure 1 Assume r_e' = 15 ▲. -Refer to Figure 1. If the RE1 is changed to a 33 ▲ resistor, the upper cutoff frequency

Figure 3 -Refer to Figure 3. Assume the unloaded gain of the amplifier is 10. The ac equivalent Thevenin circuit looking back to the drain from C2 is

Figure 4 Response of an amplifier -Refer to Figure 4. The amplifier's frequency response indicates the midrange gain is 33.6 dB. Expressed as regular gain, this is approximately

Figure 2 I_GSS(max)= 100 pA. V_GS= -2.4 V -Refer to Figure 2. Assume RS is the only resistance "seen" by C2. The value of C2 that has a lower cutoff frequency of approximately 20 Hz is

If a voltage gain of an amplifier is halved it represents a drop of

The bandwidth of an amplifier is determined by the

Figure 4 Response of an amplifier -Refer to Figure 4. The Bode plotter is a computer tool that

Assume an amplifier has a midrange voltage gain of 22. Expressed in dB, this is

Figure 3 -Refer to Figure 3. The value of C2 that will result in a lower cutoff frequency of 40 Hz is

A step- response measurement can be used to test either the high- or the low- frequency response of an amplifier.

If an amplifier has a single break frequency at the high- end of the response curve, the gain- bandwidth product for any gain c1 is equal to

Assume the output of an amplifier is measured in midrange as 1.5 Vpp. The output at cutoff is

If an amplifier has a single break frequency at the low- end of the response curve, the roll- off rate is

The midrange output of a CS amplifier with a sine wave input is phase shifted by

If Vout at the lower cutoff frequency is 1.0 V, the midrange output is 0.707 V.

The critical frequency of an amplifier is specified at a power gain of

Introduction to Semiconductors

Diodes and Applications

Special-Purpose Diodes

Bipolar Junction Transistors

Transistor Bias Circuits

BJT Amplifiers

BJT Power Amplifiers

Field-Effect Transistors Fets

Fet Amplifiers and Switching Circuits

Thyristors

The Operational Amplifier

Basic Op-Amp Circuits

Special-Purpose Integrated Circuits

Active Filters

Oscillators

Voltage Regulators

Communication Devices and Methods

Filters

Exam 10: Amplifier Frequency Response

The capacitor that determines the dominant lower cutoff frequency is

The parasitic base- collector capacitance of a CE or CS amplifier affects

At the midrange frequency of an inverting amplifier, the phase shift is 180°.

The Miller effect lowers the high- frequency response of inverting amplifiers.

Figure 1 Assume re' = 15 ▲. -Refer to Figure 1. If the RE1 is changed to a 33 ▲ resistor, the upper cutoff frequency

Figure 3 -Refer to Figure 3. Assume the unloaded gain of the amplifier is 10. The ac equivalent Thevenin circuit looking back to the drain from C2 is

Figure 4 Response of an amplifier -Refer to Figure 4. The amplifier's frequency response indicates the midrange gain is 33.6 dB. Expressed as regular gain, this is approximately

Figure 2 IGSS (max)= 100 pA. VGS = -2.4 V -Refer to Figure 2. Assume RS is the only resistance "seen" by C2. The value of C2 that has a lower cutoff frequency of approximately 20 Hz is

If a voltage gain of an amplifier is halved it represents a drop of

The bandwidth of an amplifier is determined by the

Figure 4 Response of an amplifier -Refer to Figure 4. The Bode plotter is a computer tool that

Assume an amplifier has a midrange voltage gain of 22. Expressed in dB, this is

Figure 3 -Refer to Figure 3. The value of C2 that will result in a lower cutoff frequency of 40 Hz is

A step- response measurement can be used to test either the high- or the low- frequency response of an amplifier.

If an amplifier has a single break frequency at the high- end of the response curve, the gain- bandwidth product for any gain c1 is equal to

Assume the output of an amplifier is measured in midrange as 1.5 Vpp. The output at cutoff is

If an amplifier has a single break frequency at the low- end of the response curve, the roll- off rate is

The midrange output of a CS amplifier with a sine wave input is phase shifted by

If Vout at the lower cutoff frequency is 1.0 V, the midrange output is 0.707 V.

The critical frequency of an amplifier is specified at a power gain of

Introduction to Semiconductors

Diodes and Applications

Special-Purpose Diodes

Bipolar Junction Transistors

Transistor Bias Circuits

BJT Amplifiers

BJT Power Amplifiers

Field-Effect Transistors Fets

Fet Amplifiers and Switching Circuits

Thyristors

The Operational Amplifier

Basic Op-Amp Circuits

Special-Purpose Integrated Circuits

Active Filters

Oscillators

Voltage Regulators

Communication Devices and Methods

Filters

Figure 1 Assume r_e' = 15 ▲. -Refer to Figure 1. If the RE1 is changed to a 33 ▲ resistor, the upper cutoff frequency

Figure 2 I_GSS(max)= 100 pA. V_GS= -2.4 V -Refer to Figure 2. Assume RS is the only resistance "seen" by C2. The value of C2 that has a lower cutoff frequency of approximately 20 Hz is