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 18RQ
Why is the bandwidth of the emitter−follower amplifier the largest of the three basic BJT amplifiers?
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Given 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 6
With the help of circuit diagrams, list the different biasing methods for D- MOSFET and E-MOSFET amplifiers.
1.The voltage measured from the collector to the emitter is the sum of the voltage base-emitter plus the voltage collector-base.
Select one:
True
Or
False
2.A decrease in base current of a C-E amplifier causes the voltage measured between the emitter and the collector to increase.
Select one:
True
Or
False
3.A FET is ..............controlled device whereas a bipolar transistor is a.............controlled device.
Answer:
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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- 13) In a PNP circuit, the collector is positive with respect to the emitter. 14) The output is in phase with the input in a common-emitter circuit. 15) Adding emitter resistance in a BJT amplifier increases the stability of the output.arrow_forwardConsider a common-emitter BJT amplifier circuit in Figure 3. Assume that Bac = 100 remains constant during the operating conditions, ??′= 10Ω and RL = 500Ω. If RL is connected, evaluate the voltage gain of the amplifier before and after the bypass capacitor C2 is connected. How does the voltage gain change and verify your answer?arrow_forwardConstruct an approximate voltage transfer characteristic curve of the amplifier by filling up the table below using the large signal model of the transistor and plotting the results. VI (volts) vo (volts) -2.0 0.0 1.0 2.0 Remarks assume linear transition to saturation transition to cut-off assume cut-off VI 2.5 V 100 K Ţ Voarrow_forward
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- In a common emitter bjt amplifier circuit, what parameter is described by Bre. Choices: Diode Transistor input impedance output impedance gainarrow_forwardVsis (~ Q3 (a) What is the advantage of using MOSFET as compared to BJT at the first stage of multi-stage amplifier? Rais 600 02 www Z₁ (b) Describe the function of the capacitor for the following condition: (1) (ii) SEEE/SKEE 1073 (c) The transistors parameters in Figure Q.3 are given as follow: BJT (iv) ↑ B-350, VBE 0.7 V, Ic=0.3 mA, VT 26 mV, and ro=00 E-MOSFETk 0.8 mA/V², VT- Vas(T) = 1 V C₁ HE a capacitor between stage 1 and stage 2 of a RC-coupled amplifier. bypass capacitor which is commonly used in small signal amplifier. (i) Draw the ac equivalent circuit at middle frequency for circuit in Figure Q.3 by using hybrid-x model. (ii) Determine the values of Z., Ziz and Zo. (iii) Calculate the gain, v/v, in decibel (dB). Draw and label the waveforms vo when v=2 sin 50t [mV] for one complete cycle. + Roi 50 ΚΩ Vi Ra 6 kn Ro 4.5 k Q₁ Rs 3 kQ C₂ не +15 V DS ↑ 22 R₁ 75 k R₂ 9 kn Figure Q.3 Multistage amplifier circuit Re RE 2kQ Rez 1kQ ← 2₂ -C₁ R₂ 20k2 %arrow_forwardQ#1: Explain Bipolar Junction Transistor (BJT) also explain how BJT work as an Amplifier.arrow_forward
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