Question 1

A BJT in saturation has the same characteristics as a/an

Accepted Answer

A)  open switch. 
B)  closed switch. 
A)  open switch. 
B)  closed switch. B

Question 2

In most practical BJT inverters, the value of Vin that is used to saturate the transistor is approximately equal to

Accepted Answer

A)  VCC. 
B)  VEE + 0.7 V. 
C)  VEE. 
D)  VBE + 0.7 V. 
A)  VCC. 
B)  VEE + 0.7 V. 
C)  VEE. 
D)  VBE + 0.7 V. A

Question 3

A buffer

Accepted Answer

A)  produces a 180° input/output voltage phase shift. 
B)  does not produce an input/output voltage phase shift. 
C)  is usually used to provide voltage gain. 
D)  requires at least two active devices. 
A)  produces a 180° input/output voltage phase shift. 
B)  does not produce an input/output voltage phase shift. 
C)  is usually used to provide voltage gain. 
D)  requires at least two active devices. B

Question 4

The output from an inverter has a pulse width of 55 μs and a space width of 30 μs. What is the duty cycle of the circuit?

Accepted Answer

A)  55% 
B)  64.7% 
C)  85% 
D)  39.3% 
A)  55% 
B)  64.7% 
C)  85% 
D)  39.3%

Question 5

The time required for IC to drop from 90% of its maximum value to 10% of its maximum value is called

Accepted Answer

A)  delay time. 
B)  storage time. 
C)  rise time. 
D)  fall time. 
A)  delay time. 
B)  storage time. 
C)  rise time. 
D)  fall time.

Question 6

-An engineer needs a circuit that pulses high for 30 ns when it receives an input trigger signal and then returns to its low output state. He should use .

Accepted Answer

A)  a one shot 
B)  a flip-flop 
C)  a VCO 
D)  a CCO 
A)  a one shot 
B)  a flip-flop 
C)  a VCO 
D)  a CCO

Question 7

The astable multivibrator has stable output states.

Accepted Answer

A)  zero 
B)  two 
C)  one 
D)  three 
A)  zero 
B)  two 
C)  one 
D)  three

Question 8

A JFET inverter is constructed using an n-channel JFET. This circuit produces a output pulse when it receives a input pulse.

Accepted Answer

A)  positive; positive 
B)  negative; positive 
C)  positive; negative 
D)  negative; negative 
A)  positive; positive 
B)  negative; positive 
C)  positive; negative 
D)  negative; negative

Question 9

The difference between the UTP and LTP voltages for a Schmitt trigger is called

Accepted Answer

A)  the nontrigger voltage range. 
B)  hysteresis. 
C)  the quiescent state. 
D)  the stable range. 
A)  the nontrigger voltage range. 
B)  hysteresis. 
C)  the quiescent state. 
D)  the stable range.

Question 10

-What value of IB is required to drive the transistor into saturation?

Accepted Answer

A)  25.8 μA 
B)  27.8 μA 
C)  35 μA 
D)  100 μA 
A)  25.8 μA 
B)  27.8 μA 
C)  35 μA 
D)  100 μA

Question 11

A speed-up capacitor is used to reduce

Accepted Answer

A)  BJT storage time. 
B)  BJT delay time. 
C)  BJT rise time and fall time. 
D)  BJT delay time and storage time. 
A)  BJT storage time. 
B)  BJT delay time. 
C)  BJT rise time and fall time. 
D)  BJT delay time and storage time.

Question 12

The time required for IC to reach 10% of its maximum value when a BJT is turned on is called

Accepted Answer

A)  delay time. 
B)  storage time. 
C)  rise time. 
D)  fall time. 
A)  delay time. 
B)  storage time. 
C)  rise time. 
D)  fall time.

Question 13

-What is the value of ICsat) for the circuit in Figure 19-5?

Accepted Answer

A)  5.17 mA 
B)  5.56 mA 
C)  7 mA 
D)  10 mA 
A)  5.17 mA 
B)  5.56 mA 
C)  7 mA 
D)  10 mA

Question 14

You are holding a 555 timer so that there is an indentation on the left-hand side of the IC. Pin #1 is located on the

Accepted Answer

A)  lower left-hand side of the chip. 
B)  upper left-hand side of the chip. 
C)  lower right-hand side of the chip. 
D)  upper right-hand side of the chip. 
A)  lower left-hand side of the chip. 
B)  upper left-hand side of the chip. 
C)  lower right-hand side of the chip. 
D)  upper right-hand side of the chip.

Question 15

- What is the minimum input voltage required to drive the transistor into saturation?

Accepted Answer

A)  2.15 V 
B)  2.26 V 
C)  2.66 V 
D)  6.3 V 
A)  2.15 V 
B)  2.26 V 
C)  2.66 V 
D)  6.3 V

Question 16

-The circuit in Figure  has values of R1= 10 kΩ, R2= 20 kΩ, and ±10 V supply voltages. What is the UTP value for the circuit?

Accepted Answer

A)  6 V 
B)  -6 V 
C)  5.4 V 
D)  -5.4 V 
A)  6 V 
B)  -6 V 
C)  5.4 V 
D)  -5.4 V

Question 17

-An engineer needs a circuit that oscillates at different frequencies based on the value of a dc input voltage. He should use .

Accepted Answer

A)  a one shot 
B)  a flip-flop 
C)  a VCO 
D)  a CCO 
A)  a one shot 
B)  a flip-flop 
C)  a VCO 
D)  a CCO

Question 18

The time required for IC to drop to 90% of its maximum value when a BJT is turned off is called

Accepted Answer

A)  delay time. 
B)  storage time. 
C)  rise time. 
D)  fall time. 
A)  delay time. 
B)  storage time. 
C)  rise time. 
D)  fall time.

Question 19

An inverter has output limits of 0 V and +10 V. When viewing the output of the circuit with an oscilloscope, you see that the output voltage drops from 9 V to 1 V in 50 μs. Which of the following conclusions can be drawn from this measurement?

Accepted Answer

A)  The circuit delay time is 50 μs. 
B)  The circuit rise time is 50 μs. 
C)  The circuit storage time is 50 μs. 
D)  The circuit fall time is 50 μs. 
A)  The circuit delay time is 50 μs. 
B)  The circuit rise time is 50 μs. 
C)  The circuit storage time is 50 μs. 
D)  The circuit fall time is 50 μs.

Question 20

-The circuit in Figure has values of Rf= 10 kΩ, Ri= 2 kΩ, and ±10 V supply voltages. What is the LTP voltage for the circuit?

Accepted Answer

A)  1.8 V 
B)  4.5 V 
C)  -1.8 V 
D)  -4.5 V 
A)  1.8 V 
B)  4.5 V 
C)  -1.8 V 
D)  -4.5 V

Exam 19: Solid-State Switching Circuits

A BJT in saturation has the same characteristics as a/an

In most practical BJT inverters, the value of Vin that is used to saturate the transistor is approximately equal to

A buffer

The output from an inverter has a pulse width of 55 μs and a space width of 30 μs. What is the duty cycle of the circuit?

The time required for IC to drop from 90% of its maximum value to 10% of its maximum value is called

-An engineer needs a circuit that pulses high for 30 ns when it receives an input trigger signal and then returns to its low output state. He should use .

The astable multivibrator has stable output states.

A JFET inverter is constructed using an n-channel JFET. This circuit produces a output pulse when it receives a input pulse.

The difference between the UTP and LTP voltages for a Schmitt trigger is called

-What value of IB is required to drive the transistor into saturation?

A speed-up capacitor is used to reduce

The time required for IC to reach 10% of its maximum value when a BJT is turned on is called

-What is the value of ICsat) for the circuit in Figure 19-5?

You are holding a 555 timer so that there is an indentation on the left-hand side of the IC. Pin #1 is located on the

- What is the minimum input voltage required to drive the transistor into saturation?

-The circuit in Figure has values of R1= 10 kΩ, R2= 20 kΩ, and ±10 V supply voltages. What is the UTP value for the circuit?

-An engineer needs a circuit that oscillates at different frequencies based on the value of a dc input voltage. He should use .

The time required for IC to drop to 90% of its maximum value when a BJT is turned off is called

An inverter has output limits of 0 V and +10 V. When viewing the output of the circuit with an oscilloscope, you see that the output voltage drops from 9 V to 1 V in 50 μs. Which of the following conclusions can be drawn from this measurement?

-The circuit in Figure has values of Rf= 10 kΩ, Ri= 2 kΩ, and ±10 V supply voltages. What is the LTP voltage 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

Amplifier Frequency Response

Operational Amplifiers

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

Filters