please solve with explanation exo 3
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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please solve with explanation
exo 3
![Exercise 3
An NPN transistor is used in the amplifier circuit of figure 3. The characteristic IB = f(VBE)
is assimilated to the line VBE = cst = 0.7V. The characteristic Ic = 9(1B, VCE) are assimilated to
parallel lines such as I = 100/B.
1. Plot the network of characteristics for: Ig = {0; 0.5; 10; 15; 20} μA.
2. Plot the load line for Ec = 20 V and R₁ = 10kn and on the same graphic plot the corresponding
transfer characteristic.
3. Find the operating point Po characterized by IBO, Ico
and VCEO when EB = 2V and RB = 100kn.
4. When Eg varies from 10.1 V around 2 V find grapnically
and
the
analytically
amplitude
of
variations
AIB, AIC, AVCE of IB, Ic and VCE. Deduce the voltage gain:
AVCE What does the fact that the gain is negative ?
Av
ДЕв
5. Keeping the same load line, how should you choose
the operating point P'o so that the maximum positive
and negative variations around this point are
EB
Figure 3
RB
VBE
VCE
RL
identical? What should be the value of the resistance RB, EB remaining equal to 2 V? Deduce
the new value of the gain Av.
6. Calculate the power PALO supplied by the source Ec, the power PLO dissipated in the load and
the power Pro, dissipated in the transistor when the operating point is P'o. Calculate the same
power when the voltage EB is of the form: EB = EBO + EBM Cos wt. Ego being equal to 2 V and EBM
corresponding to the maximum possible variation determined in question 5. What can we
deduce from this?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F89e1a31e-5f91-4568-a673-adaacaa6a736%2F8a53e9c4-c93c-4ac6-b9b9-c295b106e8af%2Ffh33zhr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Exercise 3
An NPN transistor is used in the amplifier circuit of figure 3. The characteristic IB = f(VBE)
is assimilated to the line VBE = cst = 0.7V. The characteristic Ic = 9(1B, VCE) are assimilated to
parallel lines such as I = 100/B.
1. Plot the network of characteristics for: Ig = {0; 0.5; 10; 15; 20} μA.
2. Plot the load line for Ec = 20 V and R₁ = 10kn and on the same graphic plot the corresponding
transfer characteristic.
3. Find the operating point Po characterized by IBO, Ico
and VCEO when EB = 2V and RB = 100kn.
4. When Eg varies from 10.1 V around 2 V find grapnically
and
the
analytically
amplitude
of
variations
AIB, AIC, AVCE of IB, Ic and VCE. Deduce the voltage gain:
AVCE What does the fact that the gain is negative ?
Av
ДЕв
5. Keeping the same load line, how should you choose
the operating point P'o so that the maximum positive
and negative variations around this point are
EB
Figure 3
RB
VBE
VCE
RL
identical? What should be the value of the resistance RB, EB remaining equal to 2 V? Deduce
the new value of the gain Av.
6. Calculate the power PALO supplied by the source Ec, the power PLO dissipated in the load and
the power Pro, dissipated in the transistor when the operating point is P'o. Calculate the same
power when the voltage EB is of the form: EB = EBO + EBM Cos wt. Ego being equal to 2 V and EBM
corresponding to the maximum possible variation determined in question 5. What can we
deduce from this?
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