Question 1

The low-frequency response of a BJT amplifier is affected by

Accepted Answer

A)  the BJT internal capacitances. 
B)  the supply voltage VC
C) . 
C)  the coupling and bypass capacitor values. 
D)  All of the above. 
A)  the BJT internal capacitances. 
B)  the supply voltage VC
C) . 
C)  the coupling and bypass capacitor values. 
D)  All of the above.

Question 2

-The transistor amplifier in Figure  has the following values: hie = 2 kΩ, hfe = 120, Cbc = 5 pF, Cbe = 10 pF, RS = 300 Ω, Rth = 1.2 kΩ, rc = 4 kΩ, and Cin = 1200 pF. What is the value of CoutM) for the circuit?

Accepted Answer

A)  4.979 μF 
B)  5pF 
C)  1200 pF 
D)  1205 pF 
A)  4.979 μF 
B)  5pF 
C)  1200 pF 
D)  1205 pF

Question 3

What frequency lies four octaves above 1 kHz?

Accepted Answer

A)  8 kHz 
B)  16 kHz 
C)  9 kHz 
D)  None of these is correct. 
A)  8 kHz 
B)  16 kHz 
C)  9 kHz 
D)  None of these is correct.

Question 4

The high-frequency response of a BJT amplifier is affected by

Accepted Answer

A)  the BJT internal capacitances. 
B)  the supply voltage VC
C) . 
C)  the coupling and bypass capacitor values. 
D)  All of the above. 
A)  the BJT internal capacitances. 
B)  the supply voltage VC
C) . 
C)  the coupling and bypass capacitor values. 
D)  All of the above.

Question 5

A BJT amplifier has been analyzed and found to have lower cutoff frequencies of 3.3 kHz, 5 kHz, and 78 Hz. It was also found to have upper cutoff frequencies of 120 kHz, and 437 kHz. What is the overall bandwidth of the amplifier?

Accepted Answer

A)  115 kHz 
B)  432 kHz 
C)  119.92 kHz 
D)  None of these is correct. 
A)  115 kHz 
B)  432 kHz 
C)  119.92 kHz 
D)  None of these is correct.

Question 6

A BJT amplifier has values of f2B = 120kHz and f2C = 437 kHz. What is the overall value of fC2 for the circuit?

Accepted Answer

A)  120 kHz 
B)  437 kHz 
C)  557 kHz 
D)  None of these is correct. 
A)  120 kHz 
B)  437 kHz 
C)  557 kHz 
D)  None of these is correct.

Question 7

Negative dB power values represent

Accepted Answer

A)  power gain. 
B)  power loss. 
C)  power values that do not change. 
D)  None of the above. 
A)  power gain. 
B)  power loss. 
C)  power values that do not change. 
D)  None of the above.

Question 8

Which of the following is an advantage of using dB representations of gain values?

Accepted Answer

A)  Positive and negative dB values represent gain and loss values that are reciprocals of each other. 
B)  In multistage amplifiers, gain calculations are simplified by the use of dB values. 
C)  Using dB values, we can represent large gain values with relatively small numbers. 
D)  All of the above. 
A)  Positive and negative dB values represent gain and loss values that are reciprocals of each other. 
B)  In multistage amplifiers, gain calculations are simplified by the use of dB values. 
C)  Using dB values, we can represent large gain values with relatively small numbers. 
D)  All of the above.

Question 9

-The transistor amplifier in Figure  has the following values: hie = 2 kΩ, hfe = 120, Cbc = 5 pF, Cbe = 10 pF, RS = 300 Ω, Rth = 1.2 kΩ, rc = 4 kΩ, and Cin = 1200 pF. What is the value of f2B for the circuit?

Accepted Answer

A)  307.5 kHz 
B)  613.8 kHz 
C)  6.631 MHz 
D)  37.1 MHz 
A)  307.5 kHz 
B)  613.8 kHz 
C)  6.631 MHz 
D)  37.1 MHz

Question 10

The value of fC1 for the input circuit of a JFET amplifier is normally that of a comparable BJT amplifier.

Accepted Answer

A)  equal to 
B)  lower than 
C)  higher than 
A)  equal to 
B)  lower than 
C)  higher than

Question 11

A common-emitter amplifier has values of Cbc = 5pF and Av = 15. What is the Miller input capacitance for the circuit?

Accepted Answer

A)  80 pF 
B)  7 pF 
C)  163.1 pF 
D)  None of these is correct. 
A)  80 pF 
B)  7 pF 
C)  163.1 pF 
D)  None of these is correct.

Question 12

An amplifier has an output power of 500 W. What is the value of ApdB) for the circuit?

Accepted Answer

A)  26.99 dB 
B)  53.98 dB 
C)  56.99 dB 
D)  Cannot be determined from the information given. 
A)  26.99 dB 
B)  53.98 dB 
C)  56.99 dB 
D)  Cannot be determined from the information given.

The low-frequency response of a BJT amplifier is affected by

-The transistor amplifier in Figure has the following values: hie = 2 kΩ, hfe = 120, Cbc = 5 pF, Cbe = 10 pF, RS = 300 Ω, Rth = 1.2 kΩ, rc = 4 kΩ, and Cin = 1200 pF. What is the value of CoutM) for the circuit?

What frequency lies four octaves above 1 kHz?

The high-frequency response of a BJT amplifier is affected by

A BJT amplifier has been analyzed and found to have lower cutoff frequencies of 3.3 kHz, 5 kHz, and 78 Hz. It was also found to have upper cutoff frequencies of 120 kHz, and 437 kHz. What is the overall bandwidth of the amplifier?

A BJT amplifier has values of f2B = 120kHz and f2C = 437 kHz. What is the overall value of fC2 for the circuit?

Negative dB power values represent

Which of the following is an advantage of using dB representations of gain values?

-The transistor amplifier in Figure has the following values: hie = 2 kΩ, hfe = 120, Cbc = 5 pF, Cbe = 10 pF, RS = 300 Ω, Rth = 1.2 kΩ, rc = 4 kΩ, and Cin = 1200 pF. What is the value of f2B for the circuit?

The value of fC1 for the input circuit of a JFET amplifier is normally that of a comparable BJT amplifier.

A common-emitter amplifier has values of Cbc = 5pF and Av = 15. What is the Miller input capacitance for the circuit?

An amplifier has an output power of 500 W. What is the value of ApdB) for the circuit?

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

Bipolar Junction Transistors

DC Biasing Circuits

Introduction to Amplifiers

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Operational Amplifiers

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

Filters

Exam 14: Amplifier Frequency Response

The low-frequency response of a BJT amplifier is affected by

-The transistor amplifier in Figure has the following values: hie = 2 kΩ, hfe = 120, Cbc = 5 pF, Cbe = 10 pF, RS = 300 Ω, Rth = 1.2 kΩ, rc = 4 kΩ, and Cin = 1200 pF. What is the value of CoutM) for the circuit?

What frequency lies four octaves above 1 kHz?

The high-frequency response of a BJT amplifier is affected by

A BJT amplifier has been analyzed and found to have lower cutoff frequencies of 3.3 kHz, 5 kHz, and 78 Hz. It was also found to have upper cutoff frequencies of 120 kHz, and 437 kHz. What is the overall bandwidth of the amplifier?

A BJT amplifier has values of f2B = 120kHz and f2C = 437 kHz. What is the overall value of fC2 for the circuit?

Negative dB power values represent

Which of the following is an advantage of using dB representations of gain values?

-The transistor amplifier in Figure has the following values: hie = 2 kΩ, hfe = 120, Cbc = 5 pF, Cbe = 10 pF, RS = 300 Ω, Rth = 1.2 kΩ, rc = 4 kΩ, and Cin = 1200 pF. What is the value of f2B for the circuit?

The value of fC1 for the input circuit of a JFET amplifier is normally that of a comparable BJT amplifier.

A common-emitter amplifier has values of Cbc = 5pF and Av = 15. What is the Miller input capacitance for the circuit?

An amplifier has an output power of 500 W. What is the value of ApdB) for the circuit?

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

Bipolar Junction Transistors

DC Biasing Circuits

Introduction to Amplifiers

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Operational Amplifiers

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

Filters