Microelectronics: Circuit Analysis and Design
4th Edition
ISBN: 9780073380643
Author: Donald A. Neamen
Publisher: McGraw-Hill Companies, The
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Textbook Question
Chapter 7, Problem 17RQ
Why is the bandwidth of a cascode amplifier larger, in general, than that of asimple common−emitter amplifier?
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Activity 2:
The amplifier circuit below has a single ac input and two ac outputs. Assuming transistor
parameters of B= 130 and VBE=0.7 V:
15 V
15 V
W
350
ΚΩ
300
ΚΩ
H11
13 ΚΩ
10 ΚΩ
1
The AC input to a common emitter amplifier (Figure 1) is such that it is comparable to thermal voltage
VT. For such an amplifier:
a. Please show how a hybrid – T small-signal model would look like. Do not ignore early effect.
b. Please derive relation for the terminal voltage gain and overall voltage gain.
Vcc
Rc
R
RE
C
Figure 1
You
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A. One of the MOSFET amplifier circuits, Common Drain (CD) Amplifiers. What advantages and
disadvantages of CD amplifiers?
B. Coupling capacitors and Bypass capacitors. What are these capacitors? Where to be used in the
amplifier circuits? Why to use these capacitors?
i -
BI-
Chapter 7 Solutions
Microelectronics: Circuit Analysis and Design
Ch. 7 - (a) For the circuit shown in Figure 7.2, the...Ch. 7 - The circuit shown in Figure 7.10 has parameters of...Ch. 7 - For the equivalent circuit shown in Figure 7.13,...Ch. 7 - The equivalent circuit in Figure 7.14 has circuit...Ch. 7 - The parameters in the circuit shown in Figure 7.15...Ch. 7 - For the circuit shown in Figure 7.2 1(a), the...Ch. 7 - Consider the circuit shown in Figure 7.22(a). The...Ch. 7 - For the emitterfollower circuit shown in Figure...Ch. 7 - The circuit shown in Figure 7.27(a) has parameters...Ch. 7 - Consider the common-base circuit shown in Figure...
Ch. 7 - The commonemitter circuit shown in Figure 7.34...Ch. 7 - A bipolar transistor has parameters o=120 ,...Ch. 7 - Prob. 7.9EPCh. 7 - For the circuit in Figure 7.41(a), the parameters...Ch. 7 - A bipolar transistor is biased at ICQ=120A and its...Ch. 7 - For the transistor described in Example 7.9 and...Ch. 7 - The parameters of a bipolar transistor are: o=150...Ch. 7 - The parameters of an nchannel MOSFET are...Ch. 7 - For the circuit in Figure 7.55, the transistor...Ch. 7 - An nchannel MOSFET has parameters Kn=0.4mA/V2 ,...Ch. 7 - An nchannel MOSFET has a unitygain bandwidth of...Ch. 7 - For a MOSFET, assume that gm=1.2mA/V . The basic...Ch. 7 - The transistor in the circuit in Figure 7.60 has...Ch. 7 - Consider the commonbase circuit in Figure 7.64....Ch. 7 - The cascode circuit in Figure 7.65 has parameters...Ch. 7 - Prob. 7.12TYUCh. 7 - For the circuit in Figure 7.72, the transistor...Ch. 7 - Describe the general frequency response of an...Ch. 7 - Describe the general characteristics of the...Ch. 7 - Describe what is meant by a system transfer...Ch. 7 - What is the criterion that defines a corner, or...Ch. 7 - Describe what is meant by the phase of the...Ch. 7 - Describe the time constant technique for...Ch. 7 - Describe the general frequency response of a...Ch. 7 - Sketch the expanded hybrid model of the BJT.Ch. 7 - Prob. 9RQCh. 7 - Prob. 10RQCh. 7 - Prob. 11RQCh. 7 - Sketch the expanded smallsignal equivalent circuit...Ch. 7 - Define the cutoff frequency for a MOSFET.Ch. 7 - Prob. 14RQCh. 7 - Why is there not a Miller effect in a commonbase...Ch. 7 - Describe the configuration of a cascode amplifier.Ch. 7 - Why is the bandwidth of a cascode amplifier...Ch. 7 - Why is the bandwidth of the emitterfollower...Ch. 7 - Prob. 7.1PCh. 7 - Prob. 7.2PCh. 7 - Consider the circuit in Figure P7.3. (a) Derive...Ch. 7 - Consider the circuit in Figure P7.4 with a signal...Ch. 7 - Consider the circuit shown in Figure P7.5. (a)...Ch. 7 - A voltage transfer function is given by...Ch. 7 - Sketch the Bode magnitude plots for the following...Ch. 7 - (a) Determine the transfer function corresponding...Ch. 7 - Consider the circuit shown in Figure 7.15 with...Ch. 7 - For the circuit shown in Figure P7.12, the...Ch. 7 - The circuit shown in Figure 7.10 has parameters...Ch. 7 - The transistor shown in Figure P7.14 has...Ch. 7 - Consider the circuit shown in Figure P7.15. The...Ch. 7 - The transistor in the circuit shown in Figure...Ch. 7 - For the common-emitter circuit in Figure P7.17,...Ch. 7 - The transistor in the circuit in Figure P7.20 has...Ch. 7 - For the circuit in Figure P7.21, the transistor...Ch. 7 - (a) For the circuit shown in Figure P7.22, write...Ch. 7 - Consider the circuit shown in Figure P7.23. (a)...Ch. 7 - The parameters of the transistor in the circuit in...Ch. 7 - A capacitor is placed in parallel with RL in the...Ch. 7 - The parameters of the transistor in the circuit in...Ch. 7 - Prob. D7.27PCh. 7 - The circuit in Figure P7.28 is a simple output...Ch. 7 - Reconsider the circuit in Figure P728. The...Ch. 7 - Consider the circuit shown in Figure P7.32. The...Ch. 7 - The commonemitter circuit in Figure P7.35 has an...Ch. 7 - Consider the commonbase circuit in Figure 7.33 in...Ch. 7 - Prob. 7.39PCh. 7 - The parameters of the transistor in the circuit in...Ch. 7 - In the commonsource amplifier in Figure 7.25(a) in...Ch. 7 - A bipolar transistor has fT=4GHz , o=120 , and...Ch. 7 - A highfrequency bipolar transistor is biased at...Ch. 7 - (a) The frequency fT of a bipolar transistor is...Ch. 7 - The circuit in Figure P7.48 is a hybrid ...Ch. 7 - Consider the circuit in Figure P7.49. Calculate...Ch. 7 - A common-emitter equivalent circuit is shown in...Ch. 7 - For the common-emitter circuit in Figure 7.41(a)...Ch. 7 - For the commonemitter circuit in Figure P7.52,...Ch. 7 - Consider the circuit in Figure P7.52. The resistor...Ch. 7 - The parameters of the circuit shown in Figure...Ch. 7 - The parameters of an nchannel MOSFET are kn=80A/V2...Ch. 7 - Find fT for a MOSFET biased at IDQ=120A and...Ch. 7 - Fill in the missing parameter values in the...Ch. 7 - (a) An nchannel MOSFET has an electron mobility of...Ch. 7 - A commonsource equivalent circuit is shown in...Ch. 7 - Prob. 7.60PCh. 7 - The parameters of an ideal nchannel MOSFET are...Ch. 7 - Figure P7.62 shows the highfrequency equivalent...Ch. 7 - For the FET circuit in Figure P7.63, the...Ch. 7 - The midband voltage gain of a commonsource MOSFET...Ch. 7 - Prob. 7.65PCh. 7 - Prob. 7.67PCh. 7 - The bias voltages of the circuit shown in Figure...Ch. 7 - For the PMOS commonsource circuit shown in Figure...Ch. 7 - In the commonbase circuit shown in Figure P7.70,...Ch. 7 - Repeat Problem 7.70 for the commonbase circuit in...Ch. 7 - In the commongate circuit in Figure P7.72, the...
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- A.What is the phase relationship between the AC input and output voltages in a common emitter amplifier ? What is the reason for the phase reversal ? B.What is the phase relationship between the ac input and output signal voltages in conmmon bas amplifier?what is the reason?arrow_forward1. Compare JFET as an terms of their advantages and disadvantages amplifier versus MOSFET as an amplifier inarrow_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?arrow_forward
- Amplifier circuit is show below has a single ac input and one ac output. Assuming 2N2222 transistor: Construct the T-model of the transistor with all parameters labelled and evaluated. Assume room temperature. Draw a complete small signal circuit model, then find the voltage gain. Explain two characteristics of this amplifier. Calculate the current gain, the input resistance, and the output resistance.arrow_forwardTrue or False(a) The output Vo is in-phase with the input Vi if the cascaded amplifier consists of two common-emitteramplifier stages.(b) The current gain, voltage gain, and output impedance are all relatively high for a cascaded amplifier consisting of two common-emitter amplifier stages.(c) The input impedance and voltage gain of a common-emitter amplifier is higher if a bypass capacitor is connected across the emitter resistor.arrow_forwardDesign-CE255/ purses / Introduction to Electronic Analysis and Design - CE255/E To use it as an amplifier Select one: a. The MOSFET should in the triode region b. The MOSFET should be in the cutoff region c. The MOSFET should be in the saturation region d. The MOSFET could be in saturation or triode region ge Esessment CE255/EE255 (O1) - Dr. Mamoun Al-Mistar Jump to...arrow_forward
- Which of the following is the basic feature of the emitter-connected amplifier circuit? I. It has voltage gain II. It has current gain III. There is a 180 degree phase difference between the input signal and the output signalarrow_forwardQ1. In your own words, explain the pinch-off region of a MOSFET and Sketch related graph[ a. b. In your own words, explain how MOSFET works as an amplifier?arrow_forward2 a) i) Draw typical output characteristics of a common emitter npn transistor and clearly identify the active, saturation, and cut off regions on your drawing. ii) Explain how you can find the common emitter de current gain, B, and the common emitter ac current gain, hre, from the common emitter output characteristics of an npn transistor. You need to draw typical output characteristics in scales and provide numerical calculations to support your explanation.arrow_forward
- What replaces each of the following elements when we draw the mid-band small-signal equivalent circuit for an amplifier: a. a dc voltage source; b. a coupling capacitor; c. a dc current source?arrow_forwardGiven the MOSFET in Figure 6 has bran) = 200 mA at VGs = 4 V and V(Tn) = 2 V; i. Plot the transfer characteristic curve for the MOSFET. b) i. Determine the operating point Vasa, Ioa and Vosa for the circuit. ii. Calculate the value of the transconductance gm at the Q-point. iv. Determine the voltage gain and input impedance of the amplifier. 15 V 1 kn. Coe 1.5 M2. Cin 33 kn. Vn 30 ka Figure 6arrow_forwardGiven a D-MOSFET circuit used as an amplifier with the following parameter: IDSS=12mA and a transconductance of gm=3.2 mS. Determine the DC drain to source voltage VDS and the AC output voltage if Vin=500 mV.arrow_forward
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