Question 1

The inputs to the differential amplifier are applied at

Accepted Answer

A) at x and y 
B) at the gates of m1 and m2 
C) all of the mentioned 
D) none of the mentioned 
A) at x and y 
B) at the gates of m1 and m2 
C) all of the mentioned 
D) none of the mentioned B

Question 2

Consider the circuit. Given hfe = 50, hie = 1200?. Find voltage gain.

Accepted Answer

A) - 278 
B) -277.9 
C) - 300 
D) - 280 
A) - 278 
B) -277.9 
C) - 300 
D) - 280 A

Question 3

Given yfs = 3.6mS and yos = 0.02mS, determine r0?

Accepted Answer

A) 100kohm 
B) 50mohm 
C) 50kohm 
D) 20kohm 
A) 100kohm 
B) 50mohm 
C) 50kohm 
D) 20kohm C

Question 4

What is the value of trans conductance?

Accepted Answer

A) 1 
B) 2 
C) 0.1 
D) 0.01 
A) 1 
B) 2 
C) 0.1 
D) 0.01

Question 5

For the circuit shown below express v0 as a function of v1 and v2.

Accepted Answer

A) v0 = v1 + v2 
B) v0 = v2 - v1 
C) v0 = v1 - v2 
D) v0 = -v1 - v2 
A) v0 = v1 + v2 
B) v0 = v2 - v1 
C) v0 = v1 - v2 
D) v0 = -v1 - v2

Question 6

Which of the following statement is incorrect?

Accepted Answer

A) output of ce amplifier is out of phase with respect to its input 
B) cc amplifier is a voltage buffer 
C) cb amplifier is a voltage buffer 
D) ce amplifier is used as an audio (low frequency) amplifier 
A) output of ce amplifier is out of phase with respect to its input 
B) cc amplifier is a voltage buffer 
C) cb amplifier is a voltage buffer 
D) ce amplifier is used as an audio (low frequency) amplifier

Question 7

Given that IB = 5mA and hfe = 55, find load current.

Accepted Answer

A) 28ma 
B) 280ma 
C) 2.5a 
D) 2a 
A) 28ma 
B) 280ma 
C) 2.5a 
D) 2a

Question 8

The Differential output of the difference amplifier is the amplification of

Accepted Answer

A) difference between the voltages of input signals 
B) difference between the output of the each transistor 
C) difference between the supply and the output of the each transistor 
D) all of the mentioned 
A) difference between the voltages of input signals 
B) difference between the output of the each transistor 
C) difference between the supply and the output of the each transistor 
D) all of the mentioned

Question 9

If source resistance in an amplifier circuit is zero, then voltage gain (output to input voltage ratio) and source voltage gain (output to source voltage ratio) are the same.

Accepted Answer

A) True 
 B)False

Question 10

Determine the voltage gain for the given circuit known that R1 = R3 = 10k? abd R2 = R4 = 100k?.

Accepted Answer

A) 1 
B) 10 
C) 100 
D) 1000 
A) 1 
B) 10 
C) 100 
D) 1000

Question 11

A FET has IDSS=4ID and gm0 = 10mS then gm =

Accepted Answer

A) 10ms 
B) 20ms 
C) 5ms 
D) 14ms 
A) 10ms 
B) 20ms 
C) 5ms 
D) 14ms

Question 12

In a small signal differential gain vs input CM level graph, the gain decreases after V2 due to:

Accepted Answer

A) as the input voltage increases, the output will be clipped 
B) when the input voltage to the transistors are high, the transistor enters saturation region and increases the current, which inturn decreases the output voltage = vdd - rd.iss 
C) when common mode voltage is greater than or equal to v2, the input transistors enter triode region, the gain begins to fall 
D) increasing the input voltage beyond v2 causes the gate oxide to conduct and the gain is reduced 
A) as the input voltage increases, the output will be clipped 
B) when the input voltage to the transistors are high, the transistor enters saturation region and increases the current, which inturn decreases the output voltage = vdd - rd.iss 
C) when common mode voltage is greater than or equal to v2, the input transistors enter triode region, the gain begins to fall 
D) increasing the input voltage beyond v2 causes the gate oxide to conduct and the gain is reduced

Question 13

What is trans-conductance?

Accepted Answer

A) ratio of change in drain current to change in collector current 
B) ratio of change in drain current to change in gate to source voltage 
C) ratio of change in collector current to change in drain current 
D) ratio of change in collector current to change in gate to source voltage 
A) ratio of change in drain current to change in collector current 
B) ratio of change in drain current to change in gate to source voltage 
C) ratio of change in collector current to change in drain current 
D) ratio of change in collector current to change in gate to source voltage

Question 14

Determine Ad and Ac for the given circuit.

Accepted Answer

A) ac = 0 and ad = 1 
B) ac ? 0 and ad = 1 
C) ac = 0 and ad ? 1 
D) ac ? 0 and ad ? 1 
A) ac = 0 and ad = 1 
B) ac ? 0 and ad = 1 
C) ac = 0 and ad ? 1 
D) ac ? 0 and ad ? 1

Question 15

002. What is the value ofgm?

Accepted Answer

A) 1 
B) 2 
C) 0.002 
D) 0 
A) 1 
B) 2 
C) 0.002 
D) 0

Question 16

In Common Mode Differential Amplifier, the outputs Vout1 and Vout2 are related as:

Accepted Answer

A) vout2 is in out of phase with vout1 with same amplitude 
B) vout2 and vout1 have same amplitude but the phase difference is 90 degrees 
C) vout1 and vout2 have same amplitude and are in phase with each other and their respective inputs 
D) vout1 and vout2 have same amplitude and are in phase with each other but out of phase with their respective inputs 
A) vout2 is in out of phase with vout1 with same amplitude 
B) vout2 and vout1 have same amplitude but the phase difference is 90 degrees 
C) vout1 and vout2 have same amplitude and are in phase with each other and their respective inputs 
D) vout1 and vout2 have same amplitude and are in phase with each other but out of phase with their respective inputs

Question 17

Given hfe = 60, hie=1000?, hoe = 20? ?-, hre = 2 * 10-4. Find the current gain of the BJT, correct up to two decimal points.

Accepted Answer

A) - 58.44 
B) -59.21 
C) - 60.10 
D) - 60.00 
A) - 58.44 
B) -59.21 
C) - 60.10 
D) - 60.00

Question 18

Consider the following circuit, where source current = 10mA, hfe = 50, hie = 1100?, then for the transistor circuit, find output resistance RO and input resistance RI.

Accepted Answer

A) ro = 0, ri = 21? 
B) ro = ?, ri = 0? 
C) ro = ?, ri = 21? 
D) ro = 10, ri = 21? 
A) ro = 0, ri = 21? 
B) ro = ?, ri = 0? 
C) ro = ?, ri = 21? 
D) ro = 10, ri = 21?

Question 19

Consider a voltage amplifier having a frequency response of the low-pass STC type with a dc gain of 60 dB and a 3-dB frequency of 1000 Hz. Then the gain db at

Accepted Answer

A) f = 10 hz is 55 db 
B) f = 10 khz is 45 db 
C) f = 100 khz is 25 db 
D) f = 1mhz is 0 db 
A) f = 10 hz is 55 db 
B) f = 10 khz is 45 db 
C) f = 100 khz is 25 db 
D) f = 1mhz is 0 db

Question 20

In a small signal equivalent model of an FET, What does gm VGS stand for?

Accepted Answer

A) a pure resistor 
B) voltage controlled current source 
C) current controlled current source 
D) voltage controlled voltage source 
A) a pure resistor 
B) voltage controlled current source 
C) current controlled current source 
D) voltage controlled voltage source

The inputs to the differential amplifier are applied at

Consider the circuit. Given hfe = 50, hie = 1200?. Find voltage gain.

Given yfs = 3.6mS and yos = 0.02mS, determine r0?

What is the value of trans conductance?

For the circuit shown below express v0 as a function of v1 and v2.

Which of the following statement is incorrect?

Given that IB = 5mA and hfe = 55, find load current.

The Differential output of the difference amplifier is the amplification of

If source resistance in an amplifier circuit is zero, then voltage gain (output to input voltage ratio) and source voltage gain (output to source voltage ratio) are the same.

Determine the voltage gain for the given circuit known that R1 = R3 = 10k? abd R2 = R4 = 100k?.

A FET has IDSS=4ID and gm0 = 10mS then gm =

In a small signal differential gain vs input CM level graph, the gain decreases after V2 due to:

What is trans-conductance?

Determine Ad and Ac for the given circuit.

002. What is the value ofgm?

In Common Mode Differential Amplifier, the outputs Vout1 and Vout2 are related as:

Given hfe = 60, hie=1000?, hoe = 20? ?-, hre = 2 * 10-4. Find the current gain of the BJT, correct up to two decimal points.

Consider the following circuit, where source current = 10mA, hfe = 50, hie = 1100?, then for the transistor circuit, find output resistance RO and input resistance RI.

Consider a voltage amplifier having a frequency response of the low-pass STC type with a dc gain of 60 dB and a 3-dB frequency of 1000 Hz. Then the gain db at

In a small signal equivalent model of an FET, What does gm VGS stand for?

Bipolar Junction Transistors BJTS

BJT Stability and Biasing Techniques

Transistor Biasing and Circuit Analysis

Transistor Amplifier

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

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Exam 5: Electrical Engineering Circuit Analysis

The inputs to the differential amplifier are applied at

Consider the circuit. Given hfe = 50, hie = 1200?. Find voltage gain.

Given yfs = 3.6mS and yos = 0.02mS, determine r0?

What is the value of trans conductance?

For the circuit shown below express v0 as a function of v1 and v2.

Which of the following statement is incorrect?

Given that IB = 5mA and hfe = 55, find load current.

The Differential output of the difference amplifier is the amplification of

If source resistance in an amplifier circuit is zero, then voltage gain (output to input voltage ratio) and source voltage gain (output to source voltage ratio) are the same.

Determine the voltage gain for the given circuit known that R1 = R3 = 10k? abd R2 = R4 = 100k?.

A FET has IDSS=4ID and gm0 = 10mS then gm =

In a small signal differential gain vs input CM level graph, the gain decreases after V2 due to:

What is trans-conductance?

Determine Ad and Ac for the given circuit.

002. What is the value ofgm?

In Common Mode Differential Amplifier, the outputs Vout1 and Vout2 are related as:

Given hfe = 60, hie=1000?, hoe = 20? ?-, hre = 2 * 10-4. Find the current gain of the BJT, correct up to two decimal points.

Consider the following circuit, where source current = 10mA, hfe = 50, hie = 1100?, then for the transistor circuit, find output resistance RO and input resistance RI.

Consider a voltage amplifier having a frequency response of the low-pass STC type with a dc gain of 60 dB and a 3-dB frequency of 1000 Hz. Then the gain db at

In a small signal equivalent model of an FET, What does gm VGS stand for?

Bipolar Junction Transistors BJTS

BJT Stability and Biasing Techniques

Transistor Biasing and Circuit Analysis

Transistor Amplifier

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