Micro Electronics

81. What is the summing point in op-amps?

1. Simulates mathematical integration
2. Acts as a scaling differentiator
3. Determines the rate of change of the integrator output voltage
4. A terminal of the op-amp where the input resistors are commonly connected

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82. What is the typical input bias current of a 741 operational amplifier?

1. 70 nA
2. 80 nA
3. 90 nA
4. 100 nA

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83. What is the typical input resistance of the op-amp amplifier when measured under open loop?

1. 2 MΩ
2. 3 MΩ
3. 1.5 MΩ
4. 2.5 MΩ

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84. What is the typical total power dissipated by the operational amplifier?

1. 5 mW
2. 0.5 mW
3. 50 mW
4. 500 mW

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85. What is VCO

1. Exhibits a frequency that can be varied with a dc control voltage
2. A single pole low pass filter
3. Is the terminal of the op-amp where input resistors are placed
4. All of the choices

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86. What process is used to produce IC semiconductor elements?

1. Alloy junction
2. Mesa diffusion
3. Grown diffusion
4. Planar diffusion

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87. What provides a parameter specifying the maximum rate of change of the output when driven by a large step-input signal?

1. Step rate
2. Slew rate
3. Step rate
4. Dynamic rate

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88. What specification of an operational amplifier which tells how fast the output voltage can change?

1. Frequency response
2. Common mode rejection ration
3. Slew rate
4. Open-loop voltage gain

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89. What type of response characterizes the single pole low pass filter?

1. Flat from dc to the critical frequency
2. Current downward up to the maximum frequency
3. Curved upward to the maximum frequency
4. No response characteristics

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90. When higher power ICs are needed, we can use

1. Monolithic ICs
2. Thin film ICs
3. Thick film ICs
4. Both b and c

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