1000+ Analog-designs Questions - Set 27 [With Solutions]

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Analog-designs Questions Set 27:

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Analog-designs Questions

Set 27/37

Collector efficiency of Class B power amplifier is

65%

50%

75%

20%

In case of schmitt trigger, if R2=20Kohm, VH=500 mV and Vsat=5V, then the value of R1 is

Determine the unit of mobility ?

cm^2 / Volt – sec

cm^2 / Volt

cm/ Volt – sec

cm^1/2 / Volt – sec

Calculate the negative feedback (β) of an amplifier if the voltage gain without the feedback is 350 and the voltage gain with the negative feedback is 15.

0.081

0.25

0.064

0.75

Calculate the AC gain of an op-amp which has an input frequency of 3000 Hz. The unity gain bandwidth of the op-amp is 12 MHz and the open loop gain is 4×10⁵.

2000

3000

4000

5000

The phenomenon known as 'Early Effect' in a bipolar transistor refers to a reduction of the effective base-width caused by

electron-hole recombination at the base

the reverse-biasing of the base-collector junction

If the two stages of an amplifier have the respective rise times as T_r1 and T_r2, then in a cascade connection the resultant rise time T_r is given by which of the following?

T_r = T_r1 + T_r2

T_r = T_r1 - T_r2

T_r = 1.1 √[(T_r1)² + (T_r2)²]

T_r = 1.1 √[(T_r1)² - (T_r2)²]

The statement that is not true for a Darlington amplifier is:

It has high input impedance and low output impedance.

It has a current gain of 1000 or more.

It consists of one NPN and one PNP transistor.

It has a common collector (emitter follower) configuration.

What is line regulation?

The process of keeping Zener diode voltage constant despite changes in AC supply

The process of keeping load voltage constant irrespective of the fluctuation in AC supply or the line voltage

The process of keeping load voltage constant irrespective of fluctuation in load current

The process of keeping Zener current constant irrespective of fluctuation in AC supply

Which of the following statements about intrinsic semiconductors is false?

A pure form of semiconductors is called an intrinsic semiconductor

Conduction in an intrinsic semiconductor is either due to thermal excitation or crystal defects

In an intrinsic semiconductor, the number of holes is equal to the number of electrons

Intrinsic semiconductors have a wide range of applications in real life

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Qn. Sets

Analog-designs Questions Set 27:

Analog-designs Questions

Collector efficiency of Class B power amplifier is

Reveal Answer

Reveal Answer

In case of schmitt trigger, if R2=20Kohm, VH=500 mV and Vsat=5V, then the value of R1 is

Reveal Answer

Reveal Answer

Determine the unit of mobility ?

Reveal Answer

Reveal Answer

Calculate the negative feedback (β) of an amplifier if the voltage gain without the feedback is 350 and the voltage gain with the negative feedback is 15.

Reveal Answer

Reveal Answer

Calculate the AC gain of an op-amp which has an input frequency of 3000 Hz. The unity gain bandwidth of the op-amp is 12 MHz and the open loop gain is 4×105.

Reveal Answer

Reveal Answer

The phenomenon known as 'Early Effect' in a bipolar transistor refers to a reduction of the effective base-width caused by

Reveal Answer

Reveal Answer

If the two stages of an amplifier have the respective rise times as Tr1 and Tr2, then in a cascade connection the resultant rise time Tr is given by which of the following?

Reveal Answer

Reveal Answer

The statement that is not true for a Darlington amplifier is:

Reveal Answer

Reveal Answer

What is line regulation?

Reveal Answer

Reveal Answer

Which of the following statements about intrinsic semiconductors is false?

Reveal Answer

Reveal Answer

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Related Topics:

Calculate the AC gain of an op-amp which has an input frequency of 3000 Hz. The unity gain bandwidth of the op-amp is 12 MHz and the open loop gain is 4×10⁵.

If the two stages of an amplifier have the respective rise times as T_r1 and T_r2, then in a cascade connection the resultant rise time T_r is given by which of the following?