An opamp has a slew rate of 5 V/μS. The largest sine wave output voltage possible at a frequency of 1MHz is
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The closed-loop voltage gain of an inverting amplifier equal to
A. The ratio of the input resistance to feedback resistance
B. The open-loop voltage gain
C. The feedback resistance divided by the input resistance
D. The input resistance
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Of the values listed, the most realistic value for open-loop voltage gain of an OP-amp is
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If ground is applied to the (+) terminal of an inverting OP-amp, the (–) terminal will
A. Not need an input resistor
B. Be virtual ground
C. Have high reverse current
D. Not invert the signal
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A certain inverting amplifier has a closed-loop voltage gain of 25. The OP-amp has an open-loop voltage gain of 100,000. If an OP-amp with an open-loop voltage gain of 200,000 is substituted in the arrangement, the closed-loop gain
A. doubles
B. drops to 12.5
C. remains at 25
D. increases slightly
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How many OP-amps are required to implement this equation V0 = V1
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The input impedance of a differential amplifier equals r'e times
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The ideal OP-AMP has the following characteristics
A. Ri = ∞ , AV = ∞ , RO = 0
B. Ri = 0, AV = ∞ , RO = 0
C. Ri = ∞ , AV = ∞ , RO = ∞
D. Ri = 0, AV = ∞ , RO = ∞
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A 741-Type OP-amp has a gain-bandwith product of 1MHz. A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of
A. 50 kHz
B. 100 kHz
C. 17 1000 kHz
D. 7.07 1000 kHz
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In the above circuit the current ix is
A. 0.6A
B. 0.5A
C. 0.2A
D. 12 1 A
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Hysteresis is desirable in Schmitt-trigger, because
A. Energy is to be stored/discharged in parasitic capacitances.
B. Effects of temperature would be compensated.
C. Devices in the circuit should be allowed time for saturation and desaturation.
D. It would prevent noise from causing false triggering.
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The tail current in a differential amplifier equals .
A. difference between two emitter currents
B. sum of two emitter currents
C. collector current divided by current gain
D. collector voltage divided by collector resistance
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An ideal OP-amp is an ideal
A. Current controlled Current source
B. Current controlled voltage source
C. Voltage controlled voltage source
D. voltage controlled current source
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The differential voltage gain of a differential amplifier is equal to RC divided by
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How many OP-amps are required to implement this equation
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A certain noninverting amplifier has Ri of 1 kΩ and Rf of 100 kΩ. The closed-loop voltage gain is
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The node voltage at the top of the til resistor is closes to ___________
A. collector supply voltage
B. zero
C. emitter supply voltage
D. tail current times base resistance
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A non inverting closed loop op amp circuit generally has a gain factor
A. Less than one
B. Greater than one
C. Of zero
D. Equal to one
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The common mode voltage gain is
A. smaller than differentail voltage gain
B. equal to differential voltage gain
C. greater than differential voltage gain
D. none of the above
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A differential amplifier ___________
A. is a part of an Op-amp
B. has one input and one output
C. has two outputs
D. A and B both
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