LICA Differential Amplifier

A Differential Amplifier should have collector resistor’s value (R_C1 , R_C2) as

• 5kΩ, 5kΩ

• 5Ω, 10kΩ

• 5Ω, 5kΩ

• 5kΩ, 10kΩ

A Differential Amplifier amplifies

• Input signal with higher voltage

• Input voltage with smaller voltage

• Sum of the input voltages

• Difference of the input voltages

If output is measured between two collectors of transistors, then the Differential amplifier with two input signals is said to be configured as

• Dual Input Unbalanced Output

• Single Input Unbalanced Output

• Dual Input Balanced Output

• Single Input Balanced Output

A differential amplifier is capable of amplifying

• DC input signal only

• AC input signal only

• AC and DC input signals

• None of the Mentioned

In ideal Differential Amplifier, if same signal is given to both inputs, then output will be

• Same as input

• Double the input

• Not equal to zero

• Zero

The purpose of level shifter in Op-amp internal circuit is to

• Increase impedance

• Adjust DC voltage

• Provide high gain

• Decrease input resistance

What is the purpose of diode in differential amplifier with constant current circuit?

• Total current independent on temperature

• Diode is dependent of temperature

• Transistor is depend on temperature

• None of the mentioned

Introducing FET differential amplifier pair at the input stage of differential amplifier produces

• High output resistance

• High input resistance

• Low input impedance

• All of the mentioned

The value of emitter resistance in Emitter Biased circuit are R_E1=25kΩ & R_E2=16kΩ. Find R_E

• 10kΩ

• 9.756kΩ

• 41kΩ

• 9.723kΩ

An emitter bias Dual Input Balanced Output differential amplifier has V_CC=20V, β=100, V_BE=0.7V, R_E=1.3kΩ. Find I_E

• 7.42mA

• 9.8mA

• 10mA

• 8.6mA