MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Consider a Miller integrator with a time constant of 1ms and an input resistance of 10 kΩ. Let the op amp have VOS (offset voltage) = 2 mV and output saturation voltages of ±12 V. What is the corner frequency of the resulting STC network? |
| A. | 1 Hz |
| B. | 0.16 Hz |
| C. | 0.33 Hz |
| D. | 0.5 Hz |
| Answer» C. 0.33 Hz | |
| 2. |
Consider a Miller integrator with a time constant of 1ms and an input resistance of 10 kΩ. Let the op amp have VOS (offset voltage) = 2 mV and output saturation voltages of ±12 V. Select the largest possible value for a feedback resistor RF so that at least ±10 V of output signal swing remains available. |
| A. | 10 kΩ |
| B. | 100 kΩ |
| C. | 1 MΩ |
| D. | 10 MΩ |
| Answer» E. | |
| 3. |
Consider a Miller integrator with a time constant of 1ms and an input resistance of 10 kΩ. Let the op amp have VOS (offset voltage) = 2 mV and output saturation voltages of ±12 V. Assuming that when the power supply is turned on the capacitor voltage is zero, how long does it take for the amplifier to saturate? |
| A. | 3s |
| B. | 6s |
| C. | 9s |
| D. | 12s |
| Answer» C. 9s | |
| 4. |
Consider an inverting amplifier circuit designed using an op amp and two resistors, R1 = 10 kΩ and R2 = 1 MΩ. If the op amp is specified to have an input bias current of 100 nA and an input offset current of 10 nA, find the output dc offset voltage resulting. |
| A. | 0.1 mV |
| B. | 1 mV |
| C. | 10 mV |
| D. | 100 mV |
| Answer» E. | |
| 5. |
Consider the circuit shown below which reduces the impact of the input bias current. If IB1 = IB2 = Input bias current, then determine the value of R3 so that the output voltage (v0) is not impacted by the input bias current. |
| A. | (R1 R2)/(R1+R2) |
| B. | (R1 R2)/(R1-R2) |
| C. | R1-(R1 R2)/(R1+R2) |
| D. | R2- (R1 R2)/(R1+R2) |
| Answer» B. (R1 R2)/(R1-R2) | |
| 6. |
For the amplifier shown determine the value of the bias current (Ib) and input offset current (Io) respectively. |
| A. | Ib = IB1 + IB2Io = IB1 – IB2 |
| B. | Ib = IB1 + IB2Io = | IB1 – IB2 | |
| C. | Ib = 0.5(IB1 + IB2) Io = | IB1 – IB2 | |
| D. | Ib = 0.5(IB1 + IB2) Io = IB1 – IB2 |
| Answer» D. Ib = 0.5(IB1 + IB2) Io = IB1 – IB2 | |
| 7. |
Consider an inverting amplifier with a nominal gain of 1000 constructed from an op amp with an input offset voltage of 3 mV and with output saturation levels of ±10 V. If the effect of VOs(input offset voltage) is nulled at room temperature (250C). The circuit is to operate at a temperature in the range 0°C to 75°C and the temperature coefficient of VOS is 10 μV/°C? |
| A. | 8.5 mV |
| B. | 9 mV |
| C. | 9.5 mV |
| D. | 10 mV |
| Answer» D. 10 mV | |
| 8. |
Consider an inverting amplifier with a nominal gain of 1000 constructed from an op amp with an input offset voltage of 3 mV and with output saturation levels of ±10 V. If the effect of VOs(input offset voltage) is nulled at room temperature (250C), how large an input can one now apply if the circuit is to operate at a constant temperature? |
| A. | 8.5 mV |
| B. | 9 mV |
| C. | 9.5 mV |
| D. | 10 mV |
| Answer» E. | |
| 9. |
Consider an inverting amplifier with a nominal gain of 1000 constructed from an op amp with an input offset voltage of 3 mV and with output saturation levels of ±10 V. What is (approximately) the peak sine-wave input signal that can be applied without output clipping? |
| A. | 7 mV |
| B. | 10 mV |
| C. | 13 mV |
| D. | 9mV |
| Answer» B. 10 mV | |