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.Management Sciences
Category: Analog Electronics
A 741-type OP-AMP has a gain-bandwidth product of 1MHz. A non-inverting amplifier using this op-amp & having a voltage gain of 20db will exhibit -3db bandwidth of__________?
A. 50 KHz
B. 100KHz
C. 1000/17 KHz
D. 1000/7.07 KHz
The horizontal intercept of dc load line is the same as ideal____________?
A. cut off point
B. saturation point
C. operating point
D. quasi saturation point
In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at_____________?
A. the edge of the depletion region on the p-side
B. the edge of the depletion region on the n-side
C. the p-n junction
D. the center of the depletion region on the n-side
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
Which of the following amplifier circuit using junction transistor has the best gain?
A. Common base
B. Common emitter
C. Common collector
D. All have the same gain
The early effect in a bipolar junction transistor is caused by_______________?
A. fast turn-on
B. fast turn-off
C. large collector-base reverse bias
D. large emitter-base forward bias
In deriving ac equivalent circuit for an amplifier circuit, we short circuit___________?
A. all resistors
B. all transistors
C. all inductors
D. all capacitors
The MOSFET switch in its on-state may be considered equivalent to_____________?
A. resistor
B. inductor
C. capacitor
D. battery
Class AB operation is often used in power large signal amplifiers in order to_________?
A. get maximum efficiency
B. remove even harmonics
C. overcome a crossover distortion
D. reducing collector dissipation
The current gain of a bipolar transistor drops at high frequencies because of____________?
A. Transistor capacitances
B. High current effects in the base
C. Parasitic inductive elements
D. The early effect
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