ENGINEERING CIRCUIT...(LL)>CUSTOM PKG.<
9th Edition
ISBN: 9781260540666
Author: Hayt
Publisher: MCG CUSTOM
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Chapter 3, Problem 60E
To determine
Find the amplifier output voltage
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Choose the correct option.
1. When operated in cutoff and saturation, the transistor acts like a
a) linear amplifier
b) switch
c) variable capacitor
d) variable resistor
2. A circuit contains two un-equal resistances in parallel
a) current is same in both
b) large current flows in larger resistor
c) potential difference across each is same
d) smaller resistance has smaller conductance
3. Which of the following is true for a bipolar junction transistor
a) IB is controlled by RB
b) IB is controlled by VBB
c) VCE is controlled by IB
d) IC is controlled by IB
e) All of the above
4. Which of the following are made of transistors
a) Integrated Circuits (ICs)
b) Microprocessors
c) Logic Gates
d) All of the above
5. Multisim is used for
a) Programming
b) Inserting multiple sims into a software
c)…
Q3)
The figure below shows the small single equivalent circuit of a single stage transistor
amplifier. The transistor has the following small signal parameters:
hie 3 ko, hfe = 90
=
22 ΚΩ
8 ΚΩ hie
hfeib
4.7 ΚΩ
Vo
Vi
e
The input signal to the amplifier, vi, is a sinewave of 20 mV amplitude at a frequency of 1
kHz. Assuming that the reactance of C is small at 1 kHz, calculate
i)
the amplitude of the base current signal ib,
ii)
the amplitude of the collector current signal,
iii)
the amplitude of the output signal vo,
iv)
the input impedance of the amplifier.
The amplifier is to amplify signals down to a frequency of 40 Hz. Determine an
appropriate value for C.
To reduce the switching harmonics present in the input current of a certain buck converter, an input filter
is added as shown in Fig. 3.33. Inductors L, and L₂ contain winding resistances R₁₁ and R2, respec-
tively. The MOSFET has on-resistance Rand the diode forward voltage drop can be modeled by a
constant voltage V plus a resistor Rp. All other losses can be ignored.
Ru
4 R₁2
C₁
(a)
(b)
(c)
2₁
+I
T
D,
Fig. 3.33 Buck converter with input filter, Problem 3.6.
Derive a complete equivalent circuit model for this circuit.
Solve your model to find the de output voltage V.
C₂: R
Derive an expression for the efficiency. Manipulate your expression into a form similar to Eq.
(3.35).
Chapter 3 Solutions
ENGINEERING CIRCUIT...(LL)>CUSTOM PKG.<
Ch. 3.2 - 3.1 (a) Count the number of branches and nodes in...Ch. 3.3 - Determine ix and vx in the circuit of Fig. 3.7....Ch. 3.3 - For the circuit of Fig. 3.9, if vR1=1V, determine...Ch. 3.3 - Determine vx in the circuit of Fig. 3.11.Ch. 3.4 - In the circuit of Fig. 3.12b, vs1 = 120 V, vs2 =...Ch. 3.4 - 3.6 In the circuit of Fig. 3.14, find the power...Ch. 3.5 - Determine v in the circuit of Fig. 3.16.Ch. 3.5 - For the single-node-pair circuit of Fig. 3.18,...Ch. 3.6 - Determine the current i in the circuit of Fig....Ch. 3.6 - Determine the voltage v in the circuit of Fig....
Ch. 3.6 - Determine whether the circuit of Fig. 3.25...Ch. 3.7 - 3.12 Determine a single-value equivalent...Ch. 3.7 - 3.13 Determine i in the circuit of Fig. 3.29....Ch. 3.7 - Determine v in the circuit of Fig. 3.31 by first...Ch. 3.7 - 3.15 For the circuit of Fig. 3.33, calculate the...Ch. 3.8 - 3.16 Use voltage division to determine vx in the...Ch. 3.8 - In the circuit of Fig. 3.40, use resistance...Ch. 3 - Referring to the circuit depicted in Fig. 3.45,...Ch. 3 - Referring to the circuit depicted in Fig. 3.46,...Ch. 3 - For the circuit of Fig. 3.47: (a) Count the number...Ch. 3 - For the circuit of Fig. 3.47: (a) Count the number...Ch. 3 - Refer to the circuit of Fig. 3.48, and answer the...Ch. 3 - A local restaurant has a neon sign constructed...Ch. 3 - Referring to the single-node diagram of Fig. 3.50,...Ch. 3 - Determine the current labeled I in each of the...Ch. 3 - In the circuit shown in Fig. 3.52, the resistor...Ch. 3 - The circuit of Fig. 3.53 represents a system...Ch. 3 - In the circuit depicted in Fig. 3.54, ix is...Ch. 3 - For the circuit of Fig. 3.55 (which employs a...Ch. 3 - Determine the current labeled I3 in the circuit of...Ch. 3 - Study the circuit depicted in Fig. 3.57, and...Ch. 3 - Prob. 15ECh. 3 - For the circuit of Fig. 3.58: (a) Determine the...Ch. 3 - For each of the circuits in Fig. 3.59, determine...Ch. 3 - Use KVL to obtain a numerical value for the...Ch. 3 - Prob. 19ECh. 3 - In the circuit of Fig. 3.55, calculate the voltage...Ch. 3 - Determine the value of vx as labeled in the...Ch. 3 - Consider the simple circuit shown in Fig. 3.63....Ch. 3 - (a) Determine a numerical value for each current...Ch. 3 - The circuit shown in Fig. 3.65 includes a device...Ch. 3 - The circuit of Fig. 3.12b is constructed with the...Ch. 3 - Obtain a numerical value for the power absorbed by...Ch. 3 - Compute the power absorbed by each element of the...Ch. 3 - Compute the power absorbed by each element in the...Ch. 3 - Kirchhoffs laws apply whether or not Ohms law...Ch. 3 - Referring to the circuit of Fig. 3.70, (a)...Ch. 3 - Determine a value for the voltage v as labeled in...Ch. 3 - Referring to the circuit depicted in Fig. 3.72,...Ch. 3 - Determine the voltage v as labeled in Fig. 3.73,...Ch. 3 - Although drawn so that it may not appear obvious...Ch. 3 - Determine the numerical value for veq in Fig....Ch. 3 - Determine the numerical value for ieq in Fig....Ch. 3 - For the circuit presented in Fig. 3.76. determine...Ch. 3 - Determine the value of v1 required to obtain a...Ch. 3 - (a) For the circuit of Fig. 3.78, determine the...Ch. 3 - What value of IS in the circuit of Fig. 3.79 will...Ch. 3 - (a) Determine the values for IX and VY in the...Ch. 3 - Determine the equivalent resistance of each of the...Ch. 3 - For each network depicted in Fig. 3.82, determine...Ch. 3 - (a) Simplify the circuit of Fig. 3.83 as much as...Ch. 3 - (a) Simplify the circuit of Fig. 3.84, using...Ch. 3 - Making appropriate use of resistor combination...Ch. 3 - Calculate the voltage labeled vx in the circuit of...Ch. 3 - Determine the power absorbed by the 15 resistor...Ch. 3 - Calculate the equivalent resistance Req of the...Ch. 3 - Show how to combine four 100 resistors to obtain...Ch. 3 - Prob. 51ECh. 3 - Prob. 52ECh. 3 - Prob. 53ECh. 3 - Prob. 54ECh. 3 - Prob. 55ECh. 3 - Prob. 56ECh. 3 - Prob. 57ECh. 3 - Prob. 58ECh. 3 - Prob. 59ECh. 3 - Prob. 60ECh. 3 - With regard to the circuit shown in Fig. 3.98,...Ch. 3 - Delete the leftmost 10 resistor in the circuit of...Ch. 3 - Consider the seven-element circuit depicted in...
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