Sign Up

Have an account? Sign In Now

Sign In

Captcha Click on image to update the captcha.

Forgot Password?

Need An Account, Sign Up Here

Forgot Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Have an account? Sign In Now

Please type your username.

Please type your E-Mail.

Please choose an appropriate title for the question so it can be answered easily.
Please choose the appropriate section so the question can be searched easily.

Please choose suitable Keywords Ex: question, poll.

Type the description thoroughly and in details.

Captcha Click on image to update the captcha.

Don't have account, Sign Up Here

Please briefly explain why you feel this question should be reported.

Please briefly explain why you feel this answer should be reported.

Please briefly explain why you feel this user should be reported.

electricalstudent
Sign InSign Up

electricalstudent

Search
Ask A Question

Mobile menu

Close
Ask a Question
  • Contact Us
Home/microelectronics by sedra and smith 8th edition chapter 9

electricalstudent Latest Questions

venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

9.116 The MOS differential amplifier shown in Fig. P9.116 utilizes three current mirrors for signal transmission: Q4−Q6 has a transmission factor of 2 [i.e., (W/L)6/(W/L)4 = 2], Q3−Q5 has a transmission factor of 1, and Q7−Q8 has a transmission factor of 2. All transistors are sized to operate at the same overdrive voltage, |VOV|. All transistors have the same Early voltage |VA|.

9.116 The MOS differential amplifier shown in Fig. P9.116 utilizes three current mirrors for signal transmission: Q4−Q6 has a transmission factor of 2 [i.e., (W/L)6/(W/L)4 = 2], Q3−Q5 has a transmission factor of 1, and Q7−Q8 has a transmission factor ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 29
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

9.115 Figure P9.115 shows a three-stage amplifier in which the stages are directly coupled. The amplifier, however, utilizes bypass capacitors, and, as such, its frequency response falls off at low frequencies. For our purposes here, we shall assume that the capacitors are large enough to act as perfect short circuits at all signal frequencies of interest.

9.115 Figure P9.115 shows a three-stage amplifier in which the stages are directly coupled. The amplifier, however, utilizes bypass capacitors, and, as such, its frequency response falls off at low frequencies. For our purposes here, we shall assume that the ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 58
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

9.114 (a) If, in the multistage amplifier of Fig. 9.38, the resistor R5 is replaced by a constant-current source images 1 mA, such that the bias situation is essentially unaffected, what does the overall voltage gain of the amplifier become? Assume that the output resistance of the current source is very high. Use the results of Example 9.8. (b) With the modification suggested in (a), what is the effect of the change on output resistance? What is the overall gain of the amplifier when loaded by 100 Ω to ground? The original amplifier (before modification) has an output resistance of 152 Ω and a voltage gain of 8513 V/V. What is its gain when loaded by 100 Ω? Comment. Use β = 100.

9.114 (a) If, in the multistage amplifier of Fig. 9.38, the resistor R5 is replaced by a constant-current source images 1 mA, such that the bias situation is essentially unaffected, what does the overall voltage gain of the amplifier become? ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 19
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

D 9.113 Consider the circuit of Fig. 9.38 and its output resistance. Which resistor has the most effect on the output resistance? What should this resistor be changed to if the output resistance is to be reduced by a factor of 2? What will the amplifier gain become after this change? What other change can you make to restore the amplifier gain to approximately its prior value? R5. 7.37 kΩ; reduced by a factor of 2; reduce R4 to 1.085 kΩ.

D 9.113 Consider the circuit of Fig. 9.38 and its output resistance. Which resistor has the most effect on the output resistance? What should this resistor be changed to if the output resistance is to be reduced by a factor ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 38
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

9.112 In the multistage amplifier of Fig. 9.38, emitter resistors are to be introduced: 100 Ω in the emitter lead of each of the first-stage transistors and 25 Ω for each of the second-stage transistors. What is the effect on input resistance, the voltage gain of the first stage, and the overall voltage gain? Use the bias values found in Example 9.7.

9.112 In the multistage amplifier of Fig. 9.38, emitter resistors are to be introduced: 100 Ω in the emitter lead of each of the first-stage transistors and 25 Ω for each of the second-stage transistors. What is the effect on ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 28
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

9.110 Figure P9.110 shows a bipolar op-amp circuit that resembles the CMOS op amp of Fig. 9.37. Here, the input differential pair Q1–Q2 is loaded in a current mirror formed by Q3 and Q4. The second stage is formed by the current-source-loaded common-emitter transistor Q5. Unlike the CMOS circuit, here there is an output stage formed by the emitter follower Q6. The function of capacitor CC will be explained later, in Chapter 11. All transistors have β = 100, |VBE| = 0.7 V, and ro = ∞.

9.110 Figure P9.110 shows a bipolar op-amp circuit that resembles the CMOS op amp of Fig. 9.37. Here, the input differential pair Q1–Q2 is loaded in a current mirror formed by Q3 and Q4. The second stage is formed by ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 34
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

9.109 The two-stage op amp in Figure P9.105 is fabricated in a 65-nm technology having images = 540 µA/V2 and Vtn = −Vtp = 0.35 V. The amplifier is operated with VDD = +1.2 V and VSS = 0 V. (a)Perform a dc design that will cause each of Q1, Q2, Q3, and Q4 to conduct a drain current of 200 µA and each of Q6 and Q7 to conduct a current of 400 µA. Design so that all transistors operate at 0.15-V overdrive voltages. Specify the W/L ratio required for each MOSFET. Present all results in a table. (b)Find the input common-mode range. (c)Find the allowable range of the output voltage. (d)With vA = vid/2 and vB = −vid/2, find the voltage gain vo/vid. Assume an Early voltage of 2.4 V.

9.109 The two-stage op amp in Figure P9.105 is fabricated in a 65-nm technology having images = 540 µA/V2 and Vtn = −Vtp = 0.35 V. The amplifier is operated with VDD = +1.2 V and VSS = 0 V. (a)Perform ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 30
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

9.108 Consider the input stage of the CMOS op amp in Fig. 9.37 with both inputs grounded. Assume that the two sides of the input stage are perfectly matched except that the threshold voltages of Q3 and Q4 have a mismatch ∆Vt. Show that a current gm3∆Vt appears at the output of the first stage. What is the corresponding input offset voltage?

9.108 Consider the input stage of the CMOS op amp in Fig. 9.37 with both inputs grounded. Assume that the two sides of the input stage are perfectly matched except that the threshold voltages of Q3 and Q4 have a ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 20
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

9.107 Consider the amplifier of Fig. 9.37, whose parameters are specified in Example 9.6. If a manufacturing error results in the W/L ratio of Q7 being 24/0.4, find the current that Q7 will now conduct. Thus find the systematic offset voltage that will appear at the output. (Use the results of Example 9.6.) Assuming that the open-loop gain will remain approximately unchanged from the value found in Example 9.6, find the corresponding value of input offset voltage, VOS. 120 μA; 455 mV; 0.73 mV

9.107 Consider the amplifier of Fig. 9.37, whose parameters are specified in Example 9.6. If a manufacturing error results in the W/L ratio of Q7 being 24/0.4, find the current that Q7 will now conduct. Thus find the systematic offset ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 20
Answer
venkyelectrical
venkyelectrical
Asked: February 13, 2022In: microelectronics

D *9.106 In a particular design of the CMOS op amp of Fig. 9.37 the designer wishes to investigate the effects of increasing the W/L ratio of both Q1 and Q2 by a factor of 4. Assuming that all other parameters are kept unchanged, refer to Example 9.6 to help you answer the following questions: (a)What change results in |VOV| and in gm of Q1 and Q2? (b)What change results in the voltage gain of the input stage? In the overall voltage gain? (c)What is the effect on the input offset voltages? (You might wish to refer to Section 9.4). – |Vov| is reduced by a factor of 2 and gm increases by a factor of 20; (b) Both increase by a factor of 20; (c) increases by a factor 2 (except for Vos due to ΔVt).

D *9.106 In a particular design of the CMOS op amp of Fig. 9.37 the designer wishes to investigate the effects of increasing the W/L ratio of both Q1 and Q2 by a factor of 4. Assuming that all other ...

microelectronics by sedra and smith 8th edition chapter 9
  • 0
  • 1
  • 24
Answer
1 2 … 13

Sidebar

Recent Posts

  • how to solve any problem on translational mechanical system transfer function
  • Problem 1. An NMOS common-source amplifier circuit shown as the figure, the transistor parameters are: VTN=0.8V, Kn = 1mA/V2, and the channel modulation effect is ignored. The circuit parameters are VDD=5V, Rs=1KΩ, RD= 4KΩ, R1=225KΩ, and R2=175KΩ.
    Find the circuit quiescent values IDQ and VDSQ.
    Drawthesmallsignalequivalentcircuit.
    FindthesmallsignalvoltagegainforRLasanopencircuit. 4. Find the input impedance Rin as indicated in the figure.
    Find the output impedance Rout as indicated in the figure.
  • (50 points) This problem has 14 questions. Consider the lossless transmission line given below. Use the attached Smith Chart to find:(a)(2 points) The magnitude I and phase A of the reflection coefficient.
    (b) (2 points) Determine the Standing Wave Ratio (SWR).(c) find the normalized load admittance y and load admittance (d) find the normalized load impedance Zion and the load impedance Zion (e) what is the distance dmin from the load to first voltage minimum indicate on the smith chart the position of voltage minimum.(f) what is the distance dmax from the load to first voltage maximum indicate on the smith chart the position of voltage maximum (g) (4 points) The total voltage on a transmission line is given by: V (2) = Vat e-iP2 + Vi eiBE
    Using I and dmax from previous questions, find the maximum voltage in terms of Vö
    (h) (4 points) Using I and din from previous questions, find the minimum voltage in terms
    of Vot
  • Quiz 1: BIT Amplifier
    Take |VBE|=0.7V, Vr=25mV, p=99. Compute the DC Bias (only IE).
    Draw the small signal model and find the overall voltage gains (vo/vsig).
  • A LTI system is described by
    y(n] = x(n] +2x|n-1] + x[n-2]
    (a) Decide its system impulse response h(n).
    (b) Is this system stable? give reasoning for your answer.
    (c) Decide its frequency response H(elo).
    (9)
    Let the discrete system is defined by input x[m], output y[n] and system
    function h|n]. Answer to the following:
    (a) Using Convolution, find output y[n] for input x[n] = 8(n] + 28[n-1] +
    8[n-2] and h(n] = U(n]. Also Sketch it using stem plot.
    (4)
    (b) Find y[n] in a closed form for x[n]= U(n] and h[n] = a”U[n]
    (assume n≥0 and a]<1). You may use Z transform.
    (4)
    Find the discrete-time system function H(z) that responds to an input
    sequence {1, 0.6; and an output sequence { 4, 2, 1, 1, 1, 1, 1, 1, 1,-
    (here
    _- means all 1s)
    (9)
    4.
    Solve, by Z-transform, for y[n] in a closed form,
    y(n+2] -y[n] -y[n+1]=0, where y[O]=0 and y[1)=1.
    Use Z[y(n+1)]=zY(z) -zy(0) and
    Z[y(n+2) = z?Y(z)-27y(0) – zy(1)

Recent Comments

  1. venkyelectrical on Bonus Problem (10 points): In this circuit, the op amp is IDEAL. The op amp is NOT operating in the linear region. In this Circuit, V+=V_. The op amp output saturates at +12v. The output is always at saturation, either positive or negative. The output will “toggle” as Vin crosses a “threshold” voltage. Because of the positive feedback, the threshold voltage changes depending on the state of the output voltage. Find the lower and upper values of the threshold voltages to 5 places of precision.
  2. venkyelectrical on Problem #3 Operational Amplifiers (35 pts): The op amp is IDEAL and operating in the linear region. Find the voltage gain (Av) of the circuit. If Vin = -2, find io.
  3. venkyelectrical on Problem #2 Operational Amplifiers (35 pts): Op amp is ideal and operating in the linear region. Find the node voltages in the table.
  4. venkyelectrical on Problem #I Linear Amplifiers (40 pts) (SHOW ALL WORK) In the Problem, all resistor values are in ohms, voltages are volts and currents are amps. Amp “A” is voltage-to-current, Amps “B” and “C” are current-to-voltage. Use /1 = 0.01(V1), v2 = 100(/2) and V3 = 50(/3). Use Vin shown in the table. Find all the values listed in the table. Hint: Observe that R3, R4 and R5 are m parallel.
  5. venkyelectrical on 3. This problem is on the quantization and encoding. Answer to the following: Assume round-off rule for uniform quantization. We have 10 samples from the analog signal and their quantization error qε are found to be distributed as, qε =[0.33, 0.36, -0.38, 0.22, -0.4, 0.07, 0.4, -0.18, -0.25, 0.38] (a) Decide the suitable value of quantization step size ∆. Give reasoning for your answer (3) (b) We assume that qε are uniformly distributed with its probability density function f ∆ (∆) =1 /∆ for the interval [-∆/2, +∆/2]. Calculate the quantization noise power Pqε for the value of ∆ you found in part (a). (3) (c) Per the quantization noise power you calculated in part (b), calculate the signal power S [Watt] if output Signal to Q-zation noise power ratio SNRo = 30 dB. (3) (d) If we encode the quantizer output with binary code with length ‘n’(integer), decide the minimum code length ‘n’ based on the condition given in part (c) (1)

Explore

  • About Us
  • Account
  • Badges
  • Blog
  • Blog list
  • Communities
  • Contact Us
  • Default Redirect Page
  • FAQs
  • Home
  • Join Us
    • Registration
  • Login
  • Lost Password
  • Member Login
  • Member Login
    • Password Reset
    • Profile
  • Member LogOut
  • Member TOS Page
  • My Account
  • Public Individual Page
  • Question Sidebar
  • Questions
    • Activities
    • Ask a question
    • Categories
    • Profile
    • Tags
  • Questions Feed
  • Register
  • Subscription Plan
  • Tags
  • Thank You
  • Typography
  • Users
  • Widgets

Footer

© 2022 electrical student. All Rights Reserved
With Love by electricalstudent.com.

need to be solved your homework ?
 

Loading Comments...
 

    Insert/edit link

    Enter the destination URL

    Or link to existing content

      No search term specified. Showing recent items. Search or use up and down arrow keys to select an item.