The Operational Amplifier Quiz – N4notes

The Operational Amplifier Quiz




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It takes an op-amp 22 µs to change its output from –15 V to +15 V. Determine the slew rate.

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A voltage-follower amplifier comes to you for service. You find the voltage gain to be 5.5 and the input impedance 22 kΩ. The probable fault in this amplifier, if any, is

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An op-amp has an open-loop gain of 100,000 and a cutoff frequency of 40 Hz. Find the open-loop gain at a frequency of 30 Hz.

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An op-amp has an open-loop gain of 75,000 and a cutoff frequency of 100 Hz. At 1 kHz the open-loop gain is down by

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An RC network has R = 47 kΩ and C = 0.22 µF. What is the cutoff frequency?

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An RC network has R = 500 kΩ and C = 10 pF. Find the value of fc.

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A certain op-amp has an open-loop voltage gain of 150,000. What is this gain expressed in dB?

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The midrange open-loop gain of an op-amp is 135 dB. With negative feedback this gain is reduced to 72 dB. The closed-loop gain is

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Negative feedback added to an op-amp _____ the bandwidth and _____ the gain.

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A practical op-amp has very _____ input impedance, very _____ output impedance, very _____ open-loop voltage gain, and a _____ bandwidth.

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The input offset voltage drift is a parameter directly related to VOS and _____.

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The maximum rate of change of the output voltage in response to a step input voltage is the _____ of an op-amp.

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A(n) _____ amplifier configuration has a higher input impedance and a lower output impedance than the op-amp itself.

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A(n) _____ amplifier configuration has an input impedance approximately equal to the input resistor Ri and an output impedance approximately equal to the output impedance of the op-amp itself.

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The _____ amplifier configuration has the highest input impedance and the lowest output impedance of the three basic op-amp configurations.

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Open-loop voltage gain of an op-amp can range up to _____.

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The ______ is the voltage gain of an op-amp with external feedback.

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A three-stage op-amp can have a maximum phase lag of _____°.

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The Operational Amplifier
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