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Home/microelectronics by sedra and smith 8th edition chapter 12

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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.55 A power MOSFET is specified to have IDmax = 5A, VDSmax = 50 V, and PDmax = 50 W. (a)Sketch the SOA boundaries. (b)If the MOSFET is used in the common-source configuration as shown in Fig. P12.55, show that the maximum current occurs when VDS = 0, the maximum VDS occurs when ID = 0, and the maximum power dissipation occurs when VDS = VDD/2. (c)For VDD = 40 V, find the smallest resistance R for which the operating point is always within the SOA. What are the corresponding values of IDmax and PDmax? (d)Repeat (c) for VDD = 30 V. (e)Repeat (c) for VDD = 15 V.

12.55 A power MOSFET is specified to have IDmax = 5A, VDSmax = 50 V, and PDmax = 50 W. (a)Sketch the SOA boundaries. (b)If the MOSFET is used in the common-source configuration as shown in Fig. P12.55, show that the maximum ...

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.54 The emitter follower in Fig. 12.3 drives a load resistance RL = 50 Ω with an output ranging between vO = ±5 V. It operates with VCC = 10 V and I = 200 mA. What is the peak power dissipation in Q1 and what is the corresponding output voltage vO? What is the peak power dissipation in Q2 and what is the corresponding vO? If identical transistors are to be used for Q1 and Q2, what minimum specifications are required for ICmax and BVCEO allowing a factor-of-2 safety margin? 2 W; +5 V; 3 W; +5 V; 600 mA; 30 V

12.54 The emitter follower in Fig. 12.3 drives a load resistance RL = 50 Ω with an output ranging between vO = ±5 V. It operates with VCC = 10 V and I = 200 mA. What is the peak ...

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.53 Consider the circuit in Fig. 12.24(b). If vA is a sine wave, what is the maximum power supplied to a load of resistance R, in terms of VDD?

12.53 Consider the circuit in Fig. 12.24(b). If vA is a sine wave, what is the maximum power supplied to a load of resistance R, in terms of VDD?

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.52 A pulse waveform swinging between ±10 V has a duty ratio of 0.7. What is its average value? If the duty ratio is changed to 0.3, what does the average value become? +4 V; −4 V

12.52 A pulse waveform swinging between ±10 V has a duty ratio of 0.7. What is its average value? If the duty ratio is changed to 0.3, what does the average value become? +4 V; −4 V

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.51 Sketch waveforms resembling those in Fig. 12.24(a). Let vT have ±10 V peaks and assume vA is a sine wave with 5-V peak amplitude. Let the frequency of vT be 5 times that of vA. The comparator output levels are ±10 V.

12.51 Sketch waveforms resembling those in Fig. 12.24(a). Let vT have ±10 V peaks and assume vA is a sine wave with 5-V peak amplitude. Let the frequency of vT be 5 times that of vA. The comparator output levels ...

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.50 Design the circuit of Fig. 12.23 to drive a load resistance of 50 Ω while exhibiting an output resistance, around the quiescent point, of 2.5 Ω. Operate QN and QP at IQ = 1.5 mA and |VOV| = 0.15 V. The technology utilized is specified to have images = 250 µA/V2, images = 100 µA/V2, Vtn = −Vtp = 0.5 V, and VDD = VSS = 2.5 V. (a)Specify (W/L) for each of QN and QP. (b)Specify the required value of μ. (c)What is the expected error in the stage gain? (d)In the quiescent state, what dc voltage must appear at the output of each of the error amplifiers? (e)At what value of positive vO will QP be supplying all the load current? Repeat for negative vO and QN supplying all the load current. (f)What is the linear range of vO? (a) 533.3; 1333.3; (b) 10 V/V; (c) 5%; (d) ± 1.85 V; (e) +0.3 V; −0.3 V; (f) −1.77 V ≤ v0 ≤ + 1.77 V

12.50 Design the circuit of Fig. 12.23 to drive a load resistance of 50 Ω while exhibiting an output resistance, around the quiescent point, of 2.5 Ω. Operate QN and QP at IQ = 1.5 mA and |VOV| = 0.15 ...

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.49 Show that in the CMOS class AB common-source output stage (Fig. 12.23), QN turns off when vO = 4IQRL and QP turns off when vO = −4IQRL. This is equivalent to saying that one of the transistors turns off when |iL| reaches 4IQ.

12.49 Show that in the CMOS class AB common-source output stage (Fig. 12.23), QN turns off when vO = 4IQRL and QP turns off when vO = −4IQRL. This is equivalent to saying that one of the transistors turns off ...

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.48 (a) Show that for the CMOS output stage of Fig. 12.23, assuming images the deviation of the gain from unity is

12.48 (a) Show that for the CMOS output stage of Fig. 12.23, assuming images the deviation of the gain from unity is

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.47 For the CMOS output stage of Fig. 12.23 with IQ = 1 mA, |VOV| = 0.2 V for each of QP and QN at the quiescent point, and μ = 5, find the output resistance at the quiescent point. 10

12.47 For the CMOS output stage of Fig. 12.23 with IQ = 1 mA, |VOV| = 0.2 V for each of QP and QN at the quiescent point, and μ = 5, find the output resistance at the quiescent point. 10

microelectronics by sedra and smith 8th edition chapter 12
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venkyelectrical
venkyelectrical
Asked: February 22, 2022In: microelectronics

12.46 The class AB output stage in Fig. 12.23 utilizes two matched transistors with kn = kp = 250 mA/V2 and is operated from ±2.5-V power supplies. If the stage is required to supply a maximum current of ±20 mA while keeping QN and QP in saturation, what is the output voltage swing realized?

12.46 The class AB output stage in Fig. 12.23 utilizes two matched transistors with kn = kp = 250 mA/V2 and is operated from ±2.5-V power supplies. If the stage is required to supply a maximum current of ±20 mA ...

microelectronics by sedra and smith 8th edition chapter 12
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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)

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