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2015 in

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2014

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1995

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a

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An op-amp has an open-loop gain of 105 and an open-loop upper cutoff frequency of 10 Hz. If this op-

amp is connected as an amplifier with a closed-loop gain of 100, then the new upper cutoff frequency is

(a) 10 Hz (b) 100 Hz (c) 10 kHz (d) 100 kHz

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An op-amp, having a slew rate of 62.8 V/sec, is connected in a voltage follower configuration. If the

maximum amplitude of the input sinusoid is 10V, then the minimum frequency at which the slew rate

limited distortion would set in at the output is

a.1.0 MHz (b) 6.28 MHz (c) 10.0 MHz (d) 62.8 MHz

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The minimum number of comparators required to build an 8 it flash ADC is

a) 8 (b) 63 (c) 255 (d) 256

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An ideal op-amp is an ideal (a) voltage controlled current source (b) voltage controlled voltage source (c) current controlled current source (d) current controlled voltage source

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