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Home/microelectronics by sedra and smith 8th edition chapter 2

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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

D*2.127 In designing with op amps one has to check the limitations on the voltage and frequency ranges of operation of the closed-loop amplifier, imposed by the op-amp finite bandwidth (ft), slew rate (SR), and output saturation (Vomax). This problem illustrates the point by considering the use of an op amp with ft = 20 MHz, SR = 10 V/µs, and Vomax = 10 V in the design of a noninverting amplifier with a nominal gain of 10. Assume a sine-wave input with peak amplitude Vi. (a) If Vi = 0.5 V, what is the maximum frequency before the output distorts? (b) If f = 200 kHz, what is the maximum value of Vi before the output distorts? (c) If Vi = 50 mV, what is the useful frequency range of operation? (d) If f = 50 kHz, what is the useful input voltage range? (a) 318.3 kHz; (b) 0.795 V; (c) 2 MHz; (d) 1 V

D*2.127 In designing with op amps one has to check the limitations on the voltage and frequency ranges of operation of the closed-loop amplifier, imposed by the op-amp finite bandwidth (ft), slew rate (SR), and output saturation (Vomax). This problem ...

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

2.126 For an amplifier having a slew rate of 40 V/µs, what is the highest frequency at which a 2-V peak-to-peak sine wave can be produced at the output? 6.37 MHz

2.126 For an amplifier having a slew rate of 40 V/µs, what is the highest frequency at which a 2-V peak-to-peak sine wave can be produced at the output? 6.37 MHz

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

2.125 An inverting amplifier with a gain of −5 V/V and input resistance 20 kΩ uses an op amp with a slew rate of 1 V/µs, maximum output current of ±1 mA, and ft = 3 MHz. (a) At what frequency will the amplifier gain drop by 1 dB? (b) At the frequency specified in (a), what is the maximum amplitude sinusoid for which the amplifier will avoid slew rate limiting? (c) Under the conditions described in parts (a) and (b), what is the largest capacitive load that can be driven while staying within the maximum output current limits?

2.125 An inverting amplifier with a gain of −5 V/V and input resistance 20 kΩ uses an op amp with a slew rate of 1 V/µs, maximum output current of ±1 mA, and ft = 3 MHz. (a) At what frequency ...

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

2.124 For operation with 10-V output pulses with the requirement that the sum of the rise and fall times represent only 20% of the pulse width (at half-amplitude), what is the slew-rate requirement for an op amp to handle pulses 20 µs wide? (Note: The rise and fall times of a pulse signal are usually measured between the 10%- and 90%-height points.) 4 V/s

2.124 For operation with 10-V output pulses with the requirement that the sum of the rise and fall times represent only 20% of the pulse width (at half-amplitude), what is the slew-rate requirement for an op amp to handle pulses ...

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

SIM 2.123 An op amp having a slew rate of 1.2 V/µs (such as the ADA4077 operating from ±5 V supplies with a 2 kΩ load) is to be used in the unity-gain follower configuration, with input pulses that rise from 0 to 2 V. What is the shortest pulse that can be used while ensuring full-amplitude output? For such a pulse, describe the output resulting.

SIM 2.123 An op amp having a slew rate of 1.2 V/µs (such as the ADA4077 operating from ±5 V supplies with a 2 kΩ load) is to be used in the unity-gain follower configuration, with input pulses that rise ...

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

SIM 2.122 Consider an op amp connected in the inverting configuration to realize a closed-loop gain of −100 V/V utilizing resistors of 1 kΩ and 100 kΩ. A load resistance RL is connected from the output to ground, and a low-frequency sine-wave signal of peak amplitude Vp is applied to the input. Let the op amp be ideal except that its output voltage saturates at ±10 V and its output current is limited to the range ±10 mA. This is the case for an ADA4077 op amp operating from ±11-V supplies. (a) For RL = 2 kΩ, what is the maximum possible value of Vp while an undistorted output sinusoid is obtained? (b) Repeat (a) for RL = 200 Ω. (c) If it is desired to obtain an output sinusoid of 10-V peak amplitude, what minimum value of RL is allowed?

SIM 2.122 Consider an op amp connected in the inverting configuration to realize a closed-loop gain of −100 V/V utilizing resistors of 1 kΩ and 100 kΩ. A load resistance RL is connected from the output to ground, and a ...

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

2.121 A particular op amp using ±15-V supplies operates linearly for outputs in the range −14 V to +14 V. If used in an inverting amplifier configuration of gain −100, what is the rms value of the largest possible sine wave that can be applied at the input without output clipping? 100 mV

2.121 A particular op amp using ±15-V supplies operates linearly for outputs in the range −14 V to +14 V. If used in an inverting amplifier configuration of gain −100, what is the rms value of the largest possible sine ...

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

**2.120 Consider an inverting summer with two inputs, V1 and V2, designed so that an ideal op amp provides Vo = −(V1 + 2V2). If the op amp has a finite gain A, show that

**2.120 Consider an inverting summer with two inputs, V1 and V2, designed so that an ideal op amp provides Vo = −(V1 + 2V2). If the op amp has a finite gain A, show that

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

2.119 Consider the use of an op amp with a unity-gain frequency ft in the realization of: (a) An inverting amplifier with dc gain of magnitude K. (b) A noninverting amplifier with a dc gain of K. In each case find the 3-dB frequency and the gain–bandwidth product (GBP ≡ |Gain| × f3dB). Comment on the results.

2.119 Consider the use of an op amp with a unity-gain frequency ft in the realization of: (a) An inverting amplifier with dc gain of magnitude K. (b) A noninverting amplifier with a dc gain of K. In each case find the 3-dB ...

microelectronics by sedra and smith 8th edition chapter 2
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venkyelectrical
venkyelectrical
Asked: January 5, 2022In: microelectronics

D**2.118 A designer, wanting to achieve a stable gain of 100 V/V with a 3-dB frequency above 5 MHz, considers her choice of amplifier topologies. What unity-gain frequency would a single operational amplifier require to satisfy her need? Unfortunately, the best available amplifier has an ft of 50 MHz. How many such amplifiers connected in a cascade of identical noninverting stages would she need to achieve her goal? What is the 3-dB frequency of each stage? What is the overall 3-dB frequency?

D**2.118 A designer, wanting to achieve a stable gain of 100 V/V with a 3-dB frequency above 5 MHz, considers her choice of amplifier topologies. What unity-gain frequency would a single operational amplifier require to satisfy her need? Unfortunately, the ...

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