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Electronic Devices and Circuit Theory

Robert Boylestad, Louis Nashelsky

Chapter 4

DC Biasing -BJTs - all with Video Answers

Educators

Chapter Questions

03:23

Problem 1

For the fixed-bias configuration of Fig. 118, determine:
a. $I_{B_{O}}$.
b. $I_{C_{Q}}$.
c. $V_{C E_{Q}}$
d. $V_{C}$.
e. $V_{B}$.
f. $V_{E}$.

Susan Hallstrom
Susan Hallstrom
Numerade Educator
01:02

Problem 2

Given the information appearing in Fig. 119, determine:
a. $I_{C}$.
b. $R_{C}$.
c. $R_{B}$.
d. $V_{C E}$

Nicholas Mogoi
Nicholas Mogoi
Numerade Educator
14:19

Problem 3

Given the information appearing in Fig. 120 , determine:
a. $I_{C}$.
b. $V_{C C}$
c. $\beta$.
d. $R_{B}$.

Gabriel Eduok
Gabriel Eduok
Numerade Educator
03:23

Problem 4

Find the saturation current $\left(I_{C_{\mathrm{sat}}}\right)$ for the fixed-bias configuration of Fig. 118 .

Susan Hallstrom
Susan Hallstrom
Numerade Educator
00:39

Problem 5

Given the BJT transistor characteristics of Fig. 121 :
a. Draw a load line on the characteristics determined by $E=21 \mathrm{~V}$ and $R_{C}=3 \mathrm{k} \Omega$ for a fixed-bias configuration.
b. Choose an operating point midway between cutoff and saturation. Determine the value of $R_{B}$ to establish the resulting operating point.
c. What are the resulting values of $I_{C_{O}}$ and $V_{C E_{O}} ?$
d. What is the value of $\beta$ at the operating point?
e. What is the value of $\alpha$ defined by the operating point?
f. What is the saturation current $\left(I_{C_{\mathrm{sat}}}\right)$ for the design?
g. Sketch the resulting fixed-bias configuration.
h. What is the dc power dissipated by the device at the operating point?
i. What is the power supplied by $V_{C C}$ ?
j. Determine the power dissipated by the resistive elements by taking the difference between the results of parts (h) and (i).

Chai Santi
Chai Santi
Numerade Educator
05:01

Problem 6

a. Ignoring the provided value of $\beta_{(120)}$ draw the load line for the network of Fig. 118 on the characteristics of Fig. 121 .
b. Find the $Q$ -point and the resulting $I_{C Q}$ and $V_{C E_{Q}}$.
c. What is the beta value at this $Q$ -point?

NT
Nikhil Tiwari
Numerade Educator
04:42

Problem 7

If the base resistor of Fig. 118 is increased to $910 \mathrm{k} \Omega$, find the new $Q$ -point and resulting values of $I_{C_{Q}}$ and $V_{C E_{Q}}$.

Shoukat Ali
Shoukat Ali
Other Schools
03:23

Problem 8

For the emitter-stabilized bias circuit of Fig. 122, determine:
a. $I_{B_{O}}$.
b. $I_{C_{Q}}$
c. $V_{C E_{Q}}$.
d. $V_{C}$.
e. $V_{B}$.
f. $V_{E}$.

Susan Hallstrom
Susan Hallstrom
Numerade Educator
09:06

Problem 9

a. Draw the load line for the network of Fig. 122 on the characteristics of Fig. 121 using $\beta$ from problem 8 to find $I_{B_{Q}}$.
b. Find the $Q$ -point and resultting values $I_{C_{Q}}$ and $V_{C E_{Q}}$.
c. Find the value of $\beta$ at the $Q$ -point.
d. How does the value of part (c) compare with $\beta=125$ in problem 8 ?
e. Why are the results for problem 9 different from those of problem 8 ?

Vishal Gupta
Vishal Gupta
Numerade Educator
01:03

Problem 10

Given the information provided in Fig. 123, determine:
a. $R_{C}$
b. $R_{E}$.
c. $R_{B}$
d. $V_{C E}$.
e. $V_{B}$

Nicholas Mogoi
Nicholas Mogoi
Numerade Educator
14:19

Problem 11

Given the information provided in Fig. 124, determine:
a. $\beta$.
b. $V_{C C}$
c. $R_{B}$.

Gabriel Eduok
Gabriel Eduok
Numerade Educator
05:04

Problem 12

Determine the saturation current $\left(I_{C_{ }}\right)$ for the network of Fig. 122 .

Thomas Thompson
Thomas Thompson
Numerade Educator
01:16

Problem 13

Using the characteristics of Fig. 121, determine the following for an emitter-bias configuration if a $Q$ -point is defined at $I_{C_{Q}}=4 \mathrm{~mA}$ and $V_{C E_{Q}}=10 \mathrm{~V}$.
a. $R_{C}$ if $V_{C C}=24 \mathrm{~V}$ and $\widetilde{R}_{E}=1.2 \mathrm{k} \Omega$.
b. $\beta$ at the operating point.
c. $R_{B}$.
d. Power dissipated by the transistor.
e. Power dissipated by the resistor $R_{C}$.

Chai Santi
Chai Santi
Numerade Educator
02:19

Problem 14

a. Determine $I_{C}$ and $V_{C E}$ for the network of Fig. 118 .
b. Change $\beta$ to 180 and determine the new value of $I_{C}$ and $V_{C E}$ for the network of Fig. 118 .
c. Determine the magnitude of the percentage change in $I_{C}$ and $V_{C E}$ using the following equations:
$$
\% \Delta I_{C}=\left|\frac{\left.I_{C_{(\text {part b })}}-I_{C_{(\text {part a }}}\right)}{I_{C_{(\text {part a })}}}\right| \times 100 \%, \quad \% \Delta V_{C E}=\left|\frac{V_{C E_{(\text {part b })}}-V_{C E_{(\text {part a) }}}}{V_{C E_{\text {(part a) }}}}\right| \times 100 \%
$$
d. Determine $I_{C}$ and $V_{C E}$ for the network of Fig. 122 .
e. Change $\beta$ to $187.5$ and determine the new value of $I_{C}$ and $V_{C E}$ for the network of Fig. 122 .
f. Determine the magnitude of the percentage change in $I_{C}$ and $V_{C E}$ using the following equations:
$$
\% \Delta I_{C}=\left|\frac{I_{C_{(\text {part } c)}}-I_{\left.C_{(\text {part }} \mathrm{d}\right)}}{I_{\left.C_{\text {(part }}\right)}}\right| \times 100 \%, \quad \% \Delta V_{C E}=\left|\frac{V_{C E_{(\text {part })}}-V_{C E_{(\text {part } 1)}}}{V_{C E_{\text {(part } d)}}}\right| \times 100 \%
$$
g. In each of the above, the magnitude of $\beta$ was increased $50 \%$. Compare the percentage change in $I_{C}$ and $V_{C E}$ for each configuration, and comment on which seems to be less sensitive to changes in $\beta$.

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
03:23

Problem 15

For the voltage-divider bias configuration of Fig. 125, determine:
a. $I_{B_{O}}$.
b. $I_{C_{Q}}$.
c. $V_{C E_{Q}}$
d. $V_{C}$.
e. $V_{E}$.
f. $V_{B}$.

Susan Hallstrom
Susan Hallstrom
Numerade Educator
03:42

Problem 16

a. Repeat problem 15 for $\beta=140$ using the general approach (not the approximate).
b. What levels are affected the most? Why?

Raymond Matshanda
Raymond Matshanda
Numerade Educator
01:02

Problem 17

Given the information provided in Fig. 126, determine:
a. $I_{C}$.
b. $V_{E}$.
c. $V_{B}$.
d. $R_{1}$.

Nicholas Mogoi
Nicholas Mogoi
Numerade Educator
01:02

Problem 18

Given the information appearing in Fig. 127, determine:
a. $I_{C}$.
b. $V_{E}$.
c. $V_{C C}$
d. $V_{C E}$.
e. $V_{B}$.
f. $R_{1}$.

Nicholas Mogoi
Nicholas Mogoi
Numerade Educator
05:04

Problem 19

Determine the saturation current $\left(I_{C_{\mathrm{sat}}}\right)$ for the network of Fig. 126 .

Thomas Thompson
Thomas Thompson
Numerade Educator
View

Problem 20

a. Repeat problem 16 with $\beta=140$ using the approximate approach and compare results.
b. Is the approximate approach valid?

Victor Salazar
Victor Salazar
Numerade Educator
04:41

Problem 21

Determine the following for the voltage-divider configuration of Fig. 128 using the approximate approach if the condition established by Eq. (33) is satisfied.
a. $I_{C}$.
b. $V_{C E}$.
c. $I_{B}$.
d. $V_{E}$.
e. $V_{B}$.

Thomas Thompson
Thomas Thompson
Numerade Educator
01:39

Problem 22

Repeat Problem 21 using the exact (Thévenin) approach and compare solutions. Based on the results, is the approximate approach a valid analysis technique if Eq. (33) is satisfied?

Tyler Moulton
Tyler Moulton
Numerade Educator
46:02

Problem 23

a. Determine $I_{C_{Q}}, V_{C E_{Q}}$, and $I_{B Q}$ for the network of Problem 15 (Fig. 125 ) using the approximate approach even though the condition established by Eq. (33) is not satisfied.
b. Determine $I_{C Q}, V_{C E_{Q}}$, and $I_{B Q}$ using the exact approach.
c. Compare solutions and comment on whether the difference is sufficiently large to require standing by Eq. (33) when determining which approach to employ.

Oswaldo Jiménez
Oswaldo Jiménez
Numerade Educator
12:48

Problem 24

a. Using the characteristics of Fig. 121, determine $R_{C}$ and $R_{E}$ for a voltage-divider network having a $Q$ -point of $I_{C_{Q}}=5 \mathrm{~mA}$ and $V_{C E_{Q}}=8 \mathrm{~V}$. Use $V_{C C}=24 \mathrm{~V}$ and $R_{C}=3 R_{E}$.
b. Find $V_{E}$.
c. Determine $V_{B}$.
d. Find $R_{2}$ if $R_{1}=24 \mathrm{k} \Omega$ assuming that $\beta R_{E}>10 R_{2}$.
e. Calculate $\beta$ at the $Q$ -point.
f. Test Eq. (33), and note whether the assumption of part (d) is correct.

Keshav Singh
Keshav Singh
Numerade Educator
05:43

Problem 25

a. Determine $I_{C}$ and $V_{C E}$ for the network of Fig. 125 .
b. Change $\beta$ to $120\left(50 \%\right.$ increase), and determine the new values of $I_{C}$ and $V_{C E}$ for the network of Fig. 125 .
c. Determine the magnitude of the percentage change in $I_{C}$ and $V_{C E}$ using the following equations:
$$
\% \Delta I_{C}=\left|\frac{I_{C_{(\text {partb })}}-I_{C_{(\text {parta })}}}{I_{C_{(\text {part a })}}}\right| \times 100 \%, \quad \% \Delta V_{C E}=\left|\frac{V_{C E_{(\text {part })}}-V_{\left.C E_{(\text {parta }}\right)}}{V_{C E_{\text {(parta) }}}}\right| \times 100 \%
$$
d. Compare the solution to part (c) with the solutions obtained for parts (c) and (f) of Problem 14 .
e. Based on the results of part (d), which configuration is least sensitive to variations in $\beta$ ?

Keshav Singh
Keshav Singh
Numerade Educator
05:37

Problem 26

a. Repeat parts (a) through (e) of Problem 25 for the network of Fig. 128. Change $\beta$ to 180 in part (b).
b. What general conclusions can be made about networks in which the condition $\beta R_{E}>10 R_{2}$ is satisfied and the quantities $I_{C}$ and $V_{C E}$ are to be determined in response to a change in $\beta ?$

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
03:23

Problem 27

For the collector-feedback configuration of Fig. 129, determine:
a. $I_{B}$.
b. $I_{C}$.
c. $V_{C}$.

Susan Hallstrom
Susan Hallstrom
Numerade Educator
03:24

Problem 28

For the network of problem 27
a. Determine $I_{C_{Q}}$ using the equation $I_{C_{Q}} \cong \frac{V^{\prime}}{R^{\prime}}=\frac{V_{C C}-V_{B E}}{R_{C}+R_{E}}$
b. Compare with the results of problem 27 for $I_{C_{Q}}$.
c. Compare $R^{\prime}$ to $R_{F / \beta}$.
d. Is the statement valid that the larger $\mathrm{R}^{\prime}$ is compared with $R_{F / \beta}$, the more accurate the equation $I_{C_{Q}} \cong \frac{V^{\prime}}{R^{\prime}} ?$ Prove using a short derivation for the exact current $I_{C_{Q}}$.
e. Repeat parts (a) and (b) for $\beta=240$ and comment on the new level of $I_{C_{Q}}$.

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
01:07

Problem 29

For the voltage feedback network of Fig. 130 , determine:
a. $I_{C}$.
b. $V_{C}$.
c. $V_{E}$.
d. $V_{C E}$.

Dominador Tan
Dominador Tan
Numerade Educator
02:39

Problem 30

a. Compare levels of $R^{\prime}=R_{C}+R_{E}$ to $R_{F / \beta}$ for the network of Fig. 131 .
b. Is the approximation $I_{C_{Q}} \cong V^{\prime} / R^{\prime}$ valid?

Kajal Gautam
Kajal Gautam
Numerade Educator
15:27

Problem 31

a. Determine the levels of $I_{C}$ and $V_{C E}$ for the network of Fig. 131 .
b. Change $\beta$ to $135(50 \%$ increase $)$, and calculate the new levels of $I_{C}$ and $V_{C E}$
c. Determine the magnitude of the percentage change in $I_{C}$ and $V_{C E}$ using the following equations:
$$
\% \Delta I_{C}=\left|\frac{I_{C_{(\text {part b })}}-I_{C_{(\text {parta })}}}{I_{C_{\text {(part a })}}}\right| \times 100 \%, \quad \% \Delta V_{C E}=\left|\frac{V_{C E_{\text {(part } b)}}-V_{C E_{(\text {para } a}}}{V_{C E_{\text {(parta) }}}}\right| \times 100 \%
$$
d. Compare the results of part (c) with those of Problems $14(\mathrm{c}), 14(\mathrm{f})$, and $25(\mathrm{c})$. How does the collector-feedback network stack up against the other configurations in sensitivity to changes in $\beta ?$

Prabhat Tyagi
Prabhat Tyagi
Numerade Educator
05:17

Problem 32

Determine the range of possible values for $V_{C}$ for the network of Fig. 132 using the $1-\mathrm{M} \Omega$ potentiometer.

Thomas Thompson
Thomas Thompson
Numerade Educator
01:42

Problem 33

Given $V_{B}=4 \mathrm{~V}$ for the network of Fig. 133, determine:
a. $V_{E}$.
b. $I_{C}$.
c. $V_{C}$.
d. $V_{C E}$.
e. $I_{B}$
f. $\beta$.

Kratika Bhadauria
Kratika Bhadauria
Numerade Educator
02:04

Problem 34

Determine the level of $V_{E}$ and $I_{E}$ for the network of Fig. 134 .

Thomas Thompson
Thomas Thompson
Numerade Educator
04:52

Problem 35

For the emitter follower network of Fig. 135
a. Find $I_{B}, I_{C}$, and $I_{E}$.
b. Determine $V_{B}, V_{C}$, and $V_{E}$.
c. Calculate $V_{B C}$ and $V_{C E}$.

Susan Hallstrom
Susan Hallstrom
Numerade Educator
05:14

Problem 36

For the network of Fig. 136, determine:
a. $I_{B}$.
b. $I_{C}$.
c. $V_{C E}$.
d. $V_{C}$.

Kajal Gautam
Kajal Gautam
Numerade Educator
02:53

Problem 37

For the network of Fig. 137, determine:
a. $I_{E}$.
b. $V_{C}$.
c. $V_{C E}$.

Thomas Thompson
Thomas Thompson
Numerade Educator
01:07

Problem 38

For the common-base network of Fig. 138
a. Using the information provided determine the value of $R_{C}$.
b. Find the currents $I_{B}$ and $I_{E}$.
c. Determine the voltages $V_{B C}$ and $V_{C E}$.

Dominador Tan
Dominador Tan
Numerade Educator
02:53

Problem 39

For the network of Fig. 139 , determine:
a. $I_{B}$.
b. $I_{C}$.
c. $V_{E}$.
d. $V_{C E}$.

Thomas Thompson
Thomas Thompson
Numerade Educator
01:42

Problem 40

Given $V_{C}=8 \mathrm{~V}$ for the network of Fig. 140, determine:
a. $I_{B}$.
b. $I_{C}$.
c. $\beta$.
d. $V_{C E}$

Kratika Bhadauria
Kratika Bhadauria
Numerade Educator
02:37

Problem 41

Determine $R_{C}$ and $R_{B}$ for a fixed-bias configuration if $V_{C C}=12 \mathrm{~V}, \beta=80$, and $I_{C_{Q}}=2.5 \mathrm{~mA}$ with $V_{C E_{Q}}=6 \mathrm{~V}$. Use standard values.

Pritesh Ranjan
Pritesh Ranjan
Numerade Educator
01:45

Problem 42

Design an emitter-stabilized network at $I_{C_{Q}}=\frac{1}{2} I_{C_{\mathrm{sat}}}$ and $V_{C E_{Q}}=\frac{1}{2} V_{C C} .$ Use $V_{C C}=20 \mathrm{~V}$, $I_{C_{\mathrm{sat}}}=10 \mathrm{~mA}, \beta=120$, and $R_{C}=4 R_{E}$. Use standard values.

Amit Srivastava
Amit Srivastava
Numerade Educator
01:45

Problem 43

Design a voltage-divider bias network using a supply of $24 \mathrm{~V}$, a transistor with a beta of 110 , and an operating point of $I_{C_{Q}}=4 \mathrm{~mA}$ and $V_{C E_{Q}}=8 \mathrm{~V}$. Choose $V_{E}=\frac{1}{8} V_{C C}$. Use standard values.

Amit Srivastava
Amit Srivastava
Numerade Educator
02:51

Problem 44

Using the characteristics of Fig. 121, design a voltage-divider configuration to have a saturation level of $10 \mathrm{~mA}$ and a $Q$ -point one-half the distance between cutoff and saturation. The available supply is $28 \mathrm{~V}$, and $V_{E}$ is to be one-fifth of $V_{C C}$. The condition established by Eq. (33) should also be met to provide a high stability factor. Use standard values.

M Hassan Anwar
M Hassan Anwar
Numerade Educator
03:35

Problem 45

For the $R-C$ -coupled amplifier of Fig. 141 determine
a. the voltages $V_{B}, V_{C}$, and $V_{E}$ for each transistor.
b. the currents $I_{B}, I_{C}$, and $I_{E}$ for each transistor

Amit Srivastava
Amit Srivastava
Numerade Educator
01:20

Problem 46

For the Darlington amplifier of Fig. 142 determine
a. the level of $\beta_{D}$.
b. the base current of each transistor.
c. the collector current of each transistor.
d. the voltages $V_{C_{1}}, V_{C_{2}}, V_{E_{1}}$, and $V_{E_{2}}$.

Amit Srivastava
Amit Srivastava
Numerade Educator
01:54

Problem 47

For the cascode amplifier of Fig. 143 determine
a. the base and collector currents of each transistor.
b. the voltages $V_{B_{1}}, V_{B_{2}}, V_{E_{1}}, V_{C_{1}}, V_{E_{2}}$, and $V_{C_{2}}$.

Varsha Aggarwal
Varsha Aggarwal
Numerade Educator
00:56

Problem 48

For the feedback amplifier of Fig. 144 determine
a. the base and collector current of each transistor.
b. the base, emitter, and collector voltages of each transistor.

Varsha Aggarwal
Varsha Aggarwal
Numerade Educator
02:47

Problem 49

Calculate the mirrored current $I$ in the circuit of Fig. 145 .

Amit Srivastava
Amit Srivastava
Numerade Educator
14:54

Problem 50

Calculate collector currents for $Q_{1}$ and $Q_{2}$ in Fig. 146 .

Brandy Heflin
Brandy Heflin
Numerade Educator
02:08

Problem 51

Calculate the current through the $2.2-\mathrm{k} \Omega$ load in the circuit of Fig. $147 .$

Ekaveera Kumar
Ekaveera Kumar
Numerade Educator
01:20

Problem 52

For the circuit of Fig. 148, calculate the current $I$.

Dave Kratz
Dave Kratz
Numerade Educator
02:17

Problem 53

Calculate the current $I$ in the circuit of Fig. 149.

Varsha Aggarwal
Varsha Aggarwal
Numerade Educator
01:42

Problem 54

Determine $V_{C}, V_{C E}$, and $I_{C}$ for the network of Fig. 150 .

Kratika Bhadauria
Kratika Bhadauria
Numerade Educator
02:53

Problem 54

Determine $V_{C}$ and $I_{B}$ for the network of Fig. 151 .

Thomas Thompson
Thomas Thompson
Numerade Educator
02:53

Problem 56

Determine $I_{E}$ and $V_{C}$ for the network of Fig. 152 .

Thomas Thompson
Thomas Thompson
Numerade Educator
02:33

Problem 57

Using the characteristics of Fig. 121, determine the appearance of the output waveform for the network of Fig. $153 .$ Include the effects of $V_{C E_{\mathrm{sat}}}$, and determine $I_{B}, I_{B_{\max }}$, and $I_{C_{\text {sat }}}$ when $V_{i}=10 \mathrm{~V}$. Determine the collector-to-emitter resistance at saturation and cutoff.

Prachita Kush
Prachita Kush
Numerade Educator
01:11

Problem 58

Design the transistor inverter of Fig. 154 to operate with a saturation current of $8 \mathrm{~mA}$ using a transistor with a beta of 100 . Use a level of $I_{B}$ equal to $120 \%$ of $I_{B_{\max }}$ and standard resistor values.

Dominador Tan
Dominador Tan
Numerade Educator
00:39

Problem 59

a. Using the characteristics of Fig. $23 \mathrm{e}$ in the chapter "Bipolar Junction Transistors", determine $t_{\mathrm{on}}$ and $t_{\text {off }}$ at a current of $2 \mathrm{~mA}$. Note the use of log scales and the possible need to refer to Section 2 in the chapter "BJT and JFET Frequency Response".
b. Repeat part (a) at a current of $10 \mathrm{~mA}$. How have $t_{\mathrm{on}}$ and $t_{\mathrm{off}}$ changed with increase in collector current?
c. For parts (a) and (b), sketch the pulse waveform of Fig. 91 and compare results.

Chai Santi
Chai Santi
Numerade Educator
03:18

Problem 60

The measurements of Fig. 155 all reveal that the network is not functioning correctly. List as many reasons as you can for the measurements obtained.

Susan Hallstrom
Susan Hallstrom
Numerade Educator
03:18

Problem 61

The measurements appearing in Fig. 156 reveal that the networks are not operating properly. Be specific in describing why the levels obtained reflect a problem with the expected network behavior. In other words, the levels obtained reflect a very specific problem in each case.

Susan Hallstrom
Susan Hallstrom
Numerade Educator
01:09

Problem 62

For the circuit of Fig. 157 :
a. Does $V_{C}$ increase or decrease if $R_{B}$ is increased?
b. Does $I_{C}$ increase or decrease if $\beta$ is reduced?
c. What happens to the saturation current if $\beta$ is increased?
d. Does the collector current increase or decrease if $V_{C C}$ is reduced?
e. What happens to $V_{C E}$ if the transistor is replaced by one with smaller $\beta$ ?

Jacob Shpiece
Jacob Shpiece
Numerade Educator
00:39

Problem 63

Answer the following questions about the circuit of Fig. 158 :
a. What happens to the voltage $V_{C}$ if the transistor is replaced by one having a larger value of $\beta ?$
b. What happens to the voltage $V_{C E}$ if the ground leg of resistor $R_{B_{2}}$ opens (does not connect to ground)?
c. What happens to $I_{C}$ if the supply voltage is low?
d. What voltage $V_{C E}$ would occur if the transistor base-emitter junction fails by becoming open?
e. What voltage $V_{C E}$ would result if the transistor base-emitter junction fails by becoming a short?

Chai Santi
Chai Santi
Numerade Educator
13:56

Problem 64

Answer the following questions about the circuit of Fig. 159 :
a. What happens to the voltage $V_{C}$ if the resistor $R_{B}$ is open?
b. What should happen to $V_{C E}$ if $\beta$ increases due to temperature?
c. How will $V_{E}$ be affected when replacing the collector resistor with one whose resistance is at the lower end of the tolerance range?
d. If the transistor collector connection becomes open, what will happen to $V_{E}$ ?
e. What might cause $V_{C E}$ to become nearly $18 \mathrm{~V}$ ?

Abhishek Jana
Abhishek Jana
Numerade Educator
01:24

Problem 65

Determine the following for the network of Fig. 118 :
a. $S\left(I_{C O}\right)$.
b. $S\left(V_{B E}\right)$.
c. $S(\beta)$, using $T_{1}$ as the temperature at which the parameter values are specified and $\beta\left(T_{2}\right)$ as $25 \%$ more than $\beta\left(T_{1}\right)$.
d. Determine the net change in $I_{C}$ if a change in operating conditions results in $I_{C O}$ increasing from $0.2 \mu \mathrm{A}$ to $10 \mu \mathrm{A}, V_{B E}$ drops from $0.7 \mathrm{~V}$ to $0.5 \mathrm{~V}$, and $\beta$ increases $25 \%$.

Prachita Kush
Prachita Kush
Numerade Educator
01:24

Problem 66

For the network of Fig. 122 , determine:
a. $S\left(I_{C O}\right)$.
b. $S\left(V_{B E}\right)$.
c. $S(\beta)$, using $T_{1}$ as the temperature at which the parameter values are specified and $\beta\left(T_{2}\right)$ as $25 \%$ more than $\beta\left(T_{1}\right)$.
d. Determine the net change in $I_{C}$ if a change in operating conditions results in $I_{C O}$ increasing from $0.2 \mu \mathrm{A}$ to $10 \mu \mathrm{A}, V_{B E}$ drops from $0.7 \mathrm{~V}$ to $0.5 \mathrm{~V}$, and $\beta$ increases $25 \%$.

Prachita Kush
Prachita Kush
Numerade Educator
01:24

Problem 67

For the network of Fig. 125, determine:
a. $S\left(I_{C O}\right)$.
b. $S\left(V_{B E}\right)$.
c. $S(\beta)$, using $T_{1}$ as the temperature at which the parameter values are specified and $\beta\left(T_{2}\right)$ as $25 \%$ more than $\beta\left(T_{1}\right)$.
d. Determine the net change in $I_{C}$ if a change in operating conditions results in $I_{C O}$ increasing from $0.2 \mu \mathrm{A}$ to $10 \mu \mathrm{A}, V_{B E}$ drops from $0.7 \mathrm{~V}$ to $0.5 \mathrm{~V}$, and $\beta$ increases $25 \%$.

Prachita Kush
Prachita Kush
Numerade Educator
01:24

Problem 68

For the network of Fig. 140 , determine:
a. $S\left(I_{C O}\right)$.
b. $S\left(V_{B E}\right)$.
c. $S(\beta)$, using $T_{1}$ as the temperature at which the parameter values are specified and $\beta\left(T_{2}\right)$ as $25 \%$ more than $\beta\left(T_{1}\right)$.
d. Determine the net change in $I_{C}$ if a change in operating conditions results in $I_{C O}$ increasing from $0.2 \mu$ A to $10 \mu$ A, $V_{B F}$ drops from $0.7 \mathrm{~V}$ to $0.5 \mathrm{~V}$, and $\beta$ increases $25 \%$.

Prachita Kush
Prachita Kush
Numerade Educator
02:21

Problem 69

Compare the relative values of stability for Problems 65 through 68 . The results for Exercises 65 and 67 can be found in the appendix "Solutions to Selected Odd-Numbered Problems". Can any general conclusions be derived from the results?

Jerelyn Nevil
Jerelyn Nevil
Numerade Educator
01:06

Problem 70

a. Compare the levels of stability for the fixed-bias configuration of Problem 65 .
b. Compare the levels of stability for the voltage-divider configuration of Problem 67 .
c. Which factors of parts (a) and (b) seem to have the most influence on the stability of the system, or is there no general pattern to the results?

Narayan Hari
Narayan Hari
Numerade Educator
02:33

Problem 71

Perform a PSpice analysis of the network of Fig. 118. That is, determine $I_{C}, V_{C E}$, and $I_{B}$.

Kajal Gautam
Kajal Gautam
Numerade Educator
02:33

Problem 72

Perform a PSpice analysis of the network of Fig. 118. That is, determine $I_{C}, V_{C E}$, and $I_{B}$.

Kajal Gautam
Kajal Gautam
Numerade Educator
01:05

Problem 73

Repeat Problem 71 for the network of Fig. 122 .

Carson Merrill
Carson Merrill
Numerade Educator
01:05

Problem 74

Repeat Problem 71 for the network of Fig. 125 .

Carson Merrill
Carson Merrill
Numerade Educator
01:23

Problem 75

Repeat Problem 71 for the network of Fig. 129 .

Carson Merrill
Carson Merrill
Numerade Educator
02:34

Problem 76

Repeat Problem 71 using Multisim.

Kajal Gautam
Kajal Gautam
Numerade Educator
02:34

Problem 77

Repeat Problem 72 using Multisim.

Kajal Gautam
Kajal Gautam
Numerade Educator
02:34

Problem 78

Repeat Problem 73 using Multisim.

Kajal Gautam
Kajal Gautam
Numerade Educator
02:34

Problem 79

Repeat Problem 74 using Multisim.

Kajal Gautam
Kajal Gautam
Numerade Educator