ANALOG ELECTRONICS QUIZ

The input stage of an op amp is usually a

class B push-pull amplifier.

differential amp.

swamped amplifier.

CE amplifier.

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A 741-type OP-amp has a gain-bandwidth product of 1MHz.A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of

1000/7.07 KHz

50 KHz

1000/17 KHz

100 KHz

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The current gain of a bipolar transistor drops at high frequencies because of

High current effects in the base

The early effect

Transistor capacitances

Parasitic inductive elements

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The input signal for an instrumentation amplifier usually comes from

a Wheatstone bridge.

an inverting amplifier.

a resistor.

a differential amplifier.

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A Semiconductor has a

None of these

Constant Temperature coefficient of resistance

Negative Temperature coefficient of resistance

Positive Temperature coefficient of resistance

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Three difference Q points are shown on a load line. The upper Q point represents the

intermediate current gain.

cutoff point.

minimum current gain.

maximum current gain.

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The emitter of the transistor is doped

none of these

heavily.

lightly.

moderately.

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In the active region, the collector current is not changed significantly by

base supply voltage.

base current.

current gain.

collector resistance.

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Assume that diode D1, D2 in figure are ideal diodes. The value of current is mcq-diagram

1 mA.

0 mA.

0.5 mA.

2 mA.

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The trapped energy of an inductive load can be feed back to the input supply through a diode known as

Zener diode.

None of these.

Feed back diode.

Powe diode.

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