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Home/microelectronics by sedra and smith 8th edition chapter 4

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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

4.91 An LED is forward-biased by a 3-V battery through a resistor. Find the resistor value required to sustain (a) 10 mA through a green LED at 2.2 V forward voltage drop. (b) 10 mA through a red LED at 1.8 V forward voltage drop. (a) 80 Ω; (b) 120 Ω

4.91 An LED is forward-biased by a 3-V battery through a resistor. Find the resistor value required to sustain (a) 10 mA through a green LED at 2.2 V forward voltage drop. (b) 10 mA through a red LED at 1.8 V ...

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

4.90 A reverse-biased photodiode is specified to have a dark current of 100 pA and a responsivity of 0.5 A/W. It is connected to the transresistance amplifier shown in Fig. P4.90. Assume an ideal op amp. (a) What is the reverse-bias voltage across the photodiode? (b) What is the output voltage vO with no illumination? (c) What is the output voltage vO with 10 µW of light incident on the photodiode?

4.90 A reverse-biased photodiode is specified to have a dark current of 100 pA and a responsivity of 0.5 A/W. It is connected to the transresistance amplifier shown in Fig. P4.90. Assume an ideal op amp. (a) What is the ...

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

4.89 A varactor has Cj0 = 150 fF at zero bias, V0 = 3V, and m = 3. Find the range of bias voltages required to vary its capacitance from 80 fF to 20 fF. 0.70 V < VR < 2.87 V

4.89 A varactor has Cj0 = 150 fF at zero bias, V0 = 3V, and m = 3. Find the range of bias voltages required to vary its capacitance from 80 fF to 20 fF. 0.70 V < VR < 2.87 ...

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

*4.88 For the circuits in Fig. P4.88, each utilizing an ideal diode (or diodes), sketch the output for the input shown. Label the most positive and most negative output levels. Assume CR ≫ T.

*4.88 For the circuits in Fig. P4.88, each utilizing an ideal diode (or diodes), sketch the output for the input shown. Label the most positive and most negative output levels. Assume CR ≫ T.

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

4.87 The clamped capacitor in Fig. P4.87 is loaded by the resistor R. The input vI is a symmetric 10-V peak-to-peak square wave at 100 kHz. Sketch the waveform at vO if the time constant CR = 10 µs.

4.87 The clamped capacitor in Fig. P4.87 is loaded by the resistor R. The input vI is a symmetric 10-V peak-to-peak square wave at 100 kHz. Sketch the waveform at vO if the time constant CR = 10 µs.

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

4.86 A clamped capacitor using an ideal diode with cathode grounded is supplied with a sine wave of 5-V rms. What is the average (dc) value of the resulting output? −7.07 V

4.86 A clamped capacitor using an ideal diode with cathode grounded is supplied with a sine wave of 5-V rms. What is the average (dc) value of the resulting output? −7.07 V

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

*4.85 The following amplitude-modulated signal is applied to the precision rectifier circuit in Fig. P4.85.

*4.85 The following amplitude-modulated signal is applied to the precision rectifier circuit in Fig. P4.85.  

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

4.84 The op amp in the circuit of Fig. P4.84 is ideal with output saturation levels of ±12 V. The diodes exhibit a constant 0.7-V drop when conducting. Find v−, vA, and vO for: (a)vI = +1V (b)vI = +3V (c)vI = −1V (d)vI = −3V

4.84 The op amp in the circuit of Fig. P4.84 is ideal with output saturation levels of ±12 V. The diodes exhibit a constant 0.7-V drop when conducting. Find v−, vA, and vO for: (a)vI = +1V (b)vI = +3V (c)vI = −1V (d)vI ...

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

4.83 The op amp in the precision rectifier circuit of Fig. P4.83 is ideal with output saturation levels of ±13 V. Assume that when conducting, the diode exhibits a constant voltage drop of 0.7 V. Find v−, vO, and vA for: (a)vI = +1V (b)vI = +3V (c)vI = −1V (d)vI = −3V

4.83 The op amp in the precision rectifier circuit of Fig. P4.83 is ideal with output saturation levels of ±13 V. Assume that when conducting, the diode exhibits a constant voltage drop of 0.7 V. Find v−, vO, and vA ...

microelectronics by sedra and smith 8th edition chapter 4
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venkyelectrical
venkyelectrical
Asked: January 9, 2022In: microelectronics

D *4.82 Consider the circuit in Fig. P4.74 with two equal filter capacitors placed across the load resistors R. Assume that the diodes available exhibit a 0.7-V drop when conducting. Design the circuit to provide ±12-V dc output voltages with a peak-to-peak ripple no greater than 1 V. Each supply should be capable of providing 100-mA dc current to its load resistor R. Completely specify the capacitors, diodes, and the transformer.

D *4.82 Consider the circuit in Fig. P4.74 with two equal filter capacitors placed across the load resistors R. Assume that the diodes available exhibit a 0.7-V drop when conducting. Design the circuit to provide ±12-V dc output voltages with ...

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