Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
7th Edition
ISBN: 9780199339136
Author: Adel S. Sedra, Kenneth C. Smith
Publisher: Oxford University Press
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Chapter 10, Problem 10.106P
a.
To determine
The value of the dc voltage gain.
b.
To determine
The estimate for the 3-dB frequency fH .
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6) Consider the following multistage amplifier. Draw the corresponding small signal model. Label, Vin, Vo1 and Vo. Do
NOT make any approximations. Do NOT perform small signal analysis with this model. Just draw the small signal
model. Show your work!
Vin
Vcc
malli
Q1
Re1
Vo1
Vcc
ww1.
Rc2
Q2
Re2
Vo
Q1. The output characteristic of a typical transistor is shown below, where the
quiescent point is selected on it. This transistor is used in the bias circuit
presented below. Find the suitable values of Rg and Rc to fix the Q-point of the
circuit properly.
+Vcc = 12 V
12-
Is = 70 uA
10-
Ig = 60 uA
8-
Rc
Is = 50 uA
Rs
6-
Ig= 40 uA
4.
Is = 30 uĄ
Is = 20 uA
B = 100
2-
VBE = 0.7 V
0-
-2-
2
4
6
8
10
12
14
16
VCE (V)
Ic (mA)
circuits by using the small signal models of the transistor. Assume the Early voltage of the
transistors are infinitely large.
Calculate the small-signal input and output impedances of the following
Vcc
R1
R1
Rout
VB
RE
Rin
R2
Chapter 10 Solutions
Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
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- Figure 1(a) shows a series fed class A amplifier circuit. In order to achieve the maximum efficiency, the Q point must be located at the center of the DC load line as shown in Figure 1(b). This generates the maximum output current swing of Icmax (p – p) RC and the maximum output voltage swing is VCEmax(p – p) = Vcc Assume that the maximum input de power is (1 Vcc Pimax(dc) = Vcc!cQ(max)=Vcc \2° Rc. 2Rc Find the maximum efficiency, 7 of this circuit.arrow_forwardCorrect the sentence: The aim of using coupling in multistage transistor amplifiers is to transfer DC output of one stage to the input of the next .stage and to isolate the d.c. conditions of one stage from the next stagearrow_forwardIt is connected to the input of a transistor (BJT) amplifier circuit with a gain of "-50" with a peak value of 100mV. a sine sign is applied a) Draw the circuit. b) Underline the input and output voltages by specifying their values.arrow_forward
- Draw the DC and AC load line for a transistor amplifier circuit shown in Figure, also describe the optimum operating Point for the given values as follows: Rc = 10 KQ ; RL=20 KQ and V cc = 20 V +Vcc Ic Rc Cc Cc V. out R1 Vin wwwarrow_forwardsig bias V D out From the circuits shown below, click on the correct small signal model for the amplifier circuit shown above. pr T FWMarrow_forwardA transistor amplifier circuit is biased so that the quiescent point is to the far left of the load line midpoint. What do you expect to occur when the input voltage begins to vary? O The output voltage will be distorted on the bottom because it will hit the lower limit for VCE before the input voltage arrives at its peak. The output voltage will be distorted on the top because it will hit the upper limit for VCE before the input voltage arrives at its peak. O The output voTransistor's output voltage will look like the input voltage amplified and inverted. The output voltage will be zero (flat).arrow_forward
- 4)please solve with work , will upvotearrow_forward3) please solve with work , will upvotearrow_forward1. For the circuit in Figure 1: a) Calculate the input and output power if the input signal results in a base current of 5 mA rms. b) Calculate the input power dissipated by the circuit if Rg is changed to 1.5 kN. c) What maximum output power can be delivered by the circuit if RB is changed to 1.5 kN? d) If the circuit is biased at its center voltage and center collector operating point, what is the input power for a maximum output power of 1.5 W? +Vcc (18 V) Rc = 16 2 RB 1.2 k2 V. B - 40 100 µF Figure 1arrow_forward
- Please solve with work shown. Will upvotearrow_forwardList the elements included in the total input resistance of a common-collector amplifier. What is the phase relationship of the input and output voltages of a CE(common emitter) and CC(common collector) amplifier? 0 T-fo TEarrow_forwardEleetroniC Analysis and s Introduction to Electronic Analysis and Design - CE255/EE255 - O1 -Spring Common Source MOSFET Amplifier has Select one: a. input is connected to the Source and the output is taken from the Drain b. input is connected to the Gate and the output is taken from the Drain c. input is connected to the Gate and the output is taken from the Source d. input is connected to the Source and the output is taken from the Gate 255 week 10 material Jump to... 16 CE255/EE255 (01)-arrow_forward
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