Question 1

If 1/h12 = 4, for a C.E. stage- what is the value of the base to collector capacitance, after Miller multiplication, at the input side?

Accepted Answer

A) 4cµ 
B) 5cµ 
C) 6cµ 
D) 1.1cµ 
A) 4cµ 
B) 5cµ 
C) 6cµ 
D) 1.1cµ C

Question 2

If the load resistance of a C.E. stage increases by a factor of 2, what happens to the high frequency response?

Accepted Answer

A) the 3 db roll off occurs faster 
B) the 3 db roll off occurs later 
C) the input pole shifts towards origin 
D) the input pole becomes infinite 
A) the 3 db roll off occurs faster 
B) the 3 db roll off occurs later 
C) the input pole shifts towards origin 
D) the input pole becomes infinite A

Question 3

The problem with the single operational difference amplifier is its

Accepted Answer

A) high input resistance 
B) low input resistance 
C) low output resistance 
D) none of the mentioned 
A) high input resistance 
B) low input resistance 
C) low output resistance 
D) none of the mentioned B

Question 4

1, ?2 = 1.5 what is the transconductance of the entire network?

Accepted Answer

A) 80 m?-1 
B) 75 m?-1 
C) 33 m?-1 
D) 55 m?-1 
A) 80 m?-1 
B) 75 m?-1 
C) 33 m?-1 
D) 55 m?-1

Question 5

The transconductance of a B.J.T.is 5mS (gm) while a 2K? (Rl) load resistance is connected to the C.E. stage. Neglecting Early effect, what is the Miller multiplication factor for the input side?

Accepted Answer

A) 21 
B) 11 
C) 20 
D) 0 
A) 21 
B) 11 
C) 20 
D) 0

Question 6

For a cascode stage, with input applied to the C.B. stage, the input capacitance gets multiplied by a factor of

Accepted Answer

A) 0 
B) 1 
C) 3 
D) 2 
A) 0 
B) 1 
C) 3 
D) 2

Question 7

What is the need for bootstrap biasing?

Accepted Answer

A) to prevent a decrease in the gain of network 
B) to prevent an increase in the input resistance due to the biasing network 
C) to prevent a decrease in the input resistance due to the presence of multiple bjt amplifiers 
D) to prevent a decrease in the input resistance due to the biasing network 
A) to prevent a decrease in the gain of network 
B) to prevent an increase in the input resistance due to the biasing network 
C) to prevent a decrease in the input resistance due to the presence of multiple bjt amplifiers 
D) to prevent a decrease in the input resistance due to the biasing network

Question 8

Ignoring early effect, if C1 is the total capacitance tied to the emitter, what is the input pole of a simple C.B. stage?

Accepted Answer

A) 1/gm * c1 
B) 2/gm * c1 
C) gm * c1 
D) gm * 2c1 
A) 1/gm * c1 
B) 2/gm * c1 
C) gm * c1 
D) gm * 2c1

Question 9

For the difference amplifier which of the following is true?

Accepted Answer

A) it responds to the difference between the two signals and rejects the signal that are common to both the signal 
B) it responds to the signal that are common to the two inputs only 
C) it has a low value of input resistance 
D) the efficacy of the amplifier is measured by the degree of its differential signal to the preference of the common mode signal 
A) it responds to the difference between the two signals and rejects the signal that are common to both the signal 
B) it responds to the signal that are common to the two inputs only 
C) it has a low value of input resistance 
D) the efficacy of the amplifier is measured by the degree of its differential signal to the preference of the common mode signal

Question 10

If the B.J.T. is used as a follower, which capacitor experiences Miller multiplication?

Accepted Answer

A) c? 
B) cµ 
C) ccs 
D) cb 
A) c? 
B) cµ 
C) ccs 
D) cb

Question 11

Obtain the collector voltage, for collector resistor (RC) =5.6k?, IE=1.664mA and VCC=10v for single input unbalanced output differential amplifier

Accepted Answer

A) 0.987v 
B) 0.682v 
C) 0.555v 
D) none of the mentioned 
A) 0.987v 
B) 0.682v 
C) 0.555v 
D) none of the mentioned

Question 12

In a Darlington pair, the overall ?=15000.?1=100. Calculate the collector current for Q2 given base current for Q1 is 20 ?A.

Accepted Answer

A) 300 ma 
B) 298 ma 
C) 2 ma 
D) 200ma 
A) 300 ma 
B) 298 ma 
C) 2 ma 
D) 200ma

Question 13

In the given circuit, hfe = 50 and hie = 1000?, find overall input and output resistance.

Accepted Answer

A) ri=956?, ro=1.6 k? 
B) ri=956 k?, ro=2 k? 
C) ri=956 ?, ro=2 k? 
D) ri=900?, ro=10 k? 
A) ri=956?, ro=1.6 k? 
B) ri=956 k?, ro=2 k? 
C) ri=956 ?, ro=2 k? 
D) ri=900?, ro=10 k?

Question 14

Consider a Darlington amplifier. In the self bias network, the biasing resistances are 220k? and 400 k?. What can be the correct value of input resistance if hfe=50 and emitter resistance = 10k?.

Accepted Answer

A) 141 k? 
B) 15 m? 
C) 20 m? 
D) 200 k? 
A) 141 k? 
B) 15 m? 
C) 20 m? 
D) 200 k?

Question 15

In a simple follower stage, C2 is a parasitic capacitance arising due to the depletion region between the collector and the substrate. What is the value of C2?

Accepted Answer

A) 0 
B) infinite 
C) ccs 
D) 2*ccs 
A) 0 
B) infinite 
C) ccs 
D) 2*ccs

Question 16

What is a cascode amplifier?

Accepted Answer

A) a cascade of two ce amplifiers 
B) a cascade of two cb amplifiers 
C) a cascade of ce and cb amplifiers 
D) a cascade of cb and cc amplifiers 
A) a cascade of two ce amplifiers 
B) a cascade of two cb amplifiers 
C) a cascade of ce and cb amplifiers 
D) a cascade of cb and cc amplifiers

Question 17

During high frequency applications of a B.J.T., which of the following three stages do not get affected by Miller's approximation?

Accepted Answer

A) c.e. 
B) c.b. 
C) c.c. 
D) follower 
A) c.e. 
B) c.b. 
C) c.c. 
D) follower

Question 18

Which of these are incorrect about Darlington amplifier?

Accepted Answer

A) it has a high input resistance 
B) the output resistance is low 
C) it has a unity voltage gain 
D) it is a current buffer 
A) it has a high input resistance 
B) the output resistance is low 
C) it has a unity voltage gain 
D) it is a current buffer

If 1/h12 = 4, for a C.E. stage- what is the value of the base to collector capacitance, after Miller multiplication, at the input side?

If the load resistance of a C.E. stage increases by a factor of 2, what happens to the high frequency response?

The problem with the single operational difference amplifier is its

1, ?2 = 1.5 what is the transconductance of the entire network?

The transconductance of a B.J.T.is 5mS (gm) while a 2K? (Rl) load resistance is connected to the C.E. stage. Neglecting Early effect, what is the Miller multiplication factor for the input side?

For a cascode stage, with input applied to the C.B. stage, the input capacitance gets multiplied by a factor of

What is the need for bootstrap biasing?

Ignoring early effect, if C1 is the total capacitance tied to the emitter, what is the input pole of a simple C.B. stage?

For the difference amplifier which of the following is true?

If the B.J.T. is used as a follower, which capacitor experiences Miller multiplication?

Obtain the collector voltage, for collector resistor (RC) =5.6k?, IE=1.664mA and VCC=10v for single input unbalanced output differential amplifier

In a Darlington pair, the overall ?=15000.?1=100. Calculate the collector current for Q2 given base current for Q1 is 20 ?A.

In the given circuit, hfe = 50 and hie = 1000?, find overall input and output resistance.

Consider a Darlington amplifier. In the self bias network, the biasing resistances are 220k? and 400 k?. What can be the correct value of input resistance if hfe=50 and emitter resistance = 10k?.

In a simple follower stage, C2 is a parasitic capacitance arising due to the depletion region between the collector and the substrate. What is the value of C2?

What is a cascode amplifier?

During high frequency applications of a B.J.T., which of the following three stages do not get affected by Miller's approximation?

Which of these are incorrect about Darlington amplifier?

Bipolar Junction Transistors BJTS

BJT Stability and Biasing Techniques

Transistor Biasing and Circuit Analysis

Electrical Engineering Circuit Analysis

BJT Frequency Response and Capacitance Analysis

Electrical Engineering on Capacitance, Amplifiers, and Switching Regulators

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Exam 4: Transistor Amplifier

If 1/h12 = 4, for a C.E. stage- what is the value of the base to collector capacitance, after Miller multiplication, at the input side?

If the load resistance of a C.E. stage increases by a factor of 2, what happens to the high frequency response?

The problem with the single operational difference amplifier is its

1, ?2 = 1.5 what is the transconductance of the entire network?

The transconductance of a B.J.T.is 5mS (gm) while a 2K? (Rl) load resistance is connected to the C.E. stage. Neglecting Early effect, what is the Miller multiplication factor for the input side?

For a cascode stage, with input applied to the C.B. stage, the input capacitance gets multiplied by a factor of

What is the need for bootstrap biasing?

Ignoring early effect, if C1 is the total capacitance tied to the emitter, what is the input pole of a simple C.B. stage?

For the difference amplifier which of the following is true?

If the B.J.T. is used as a follower, which capacitor experiences Miller multiplication?

Obtain the collector voltage, for collector resistor (RC) =5.6k?, IE=1.664mA and VCC=10v for single input unbalanced output differential amplifier

In a Darlington pair, the overall ?=15000.?1=100. Calculate the collector current for Q2 given base current for Q1 is 20 ?A.

In the given circuit, hfe = 50 and hie = 1000?, find overall input and output resistance.

Consider a Darlington amplifier. In the self bias network, the biasing resistances are 220k? and 400 k?. What can be the correct value of input resistance if hfe=50 and emitter resistance = 10k?.

In a simple follower stage, C2 is a parasitic capacitance arising due to the depletion region between the collector and the substrate. What is the value of C2?

What is a cascode amplifier?

During high frequency applications of a B.J.T., which of the following three stages do not get affected by Miller's approximation?

Which of these are incorrect about Darlington amplifier?

Bipolar Junction Transistors BJTS

BJT Stability and Biasing Techniques

Transistor Biasing and Circuit Analysis

Electrical Engineering Circuit Analysis

BJT Frequency Response and Capacitance Analysis

Electrical Engineering on Capacitance, Amplifiers, and Switching Regulators

Electronics and Power Supply

HVDC Transmission, DC Power Supplies, and Zener Diodes

Filters