IV Semester-2

An op-amp can be used with

• dc signal only
• ac signal only
• neither ac and dc signals
• both ac and dc signals

Identify the Differential Amplifier configuration

• Dual Input Unbalanced Output
• Dual Input Balanced Output
• Single Input Unbalanced Output
• Single Input Balanced Output

For the following circuit with Rc1=Rc2=RE=65kiloohm and supply voltages each of 15V, Vc=7.92V and IB=1.09uA.

• True
• False

Identify the correct option

• I2 = (VEE-VD)/ R2
• Current through R2 is same as collector current of Q3
• Thermally unstable Current Source Circuit
• Both 1 and 2

Input Impedence of differential amplifier can be enhanced using

• Darlington Pair
• FET
• Both 1 and 2
• None

The CMRR of a differential amplifier defines the ability to

• reject the noise signal appearing in both the input terminals
• reject the common dc signal appearing in both the input terminals
• reject the common ac signal appearing in both the input terminal
• All the above

The input impedence of all the four differential amplifiers is identical.

• True
• False

Op-amp has the following better amplifier properties than BJT

• Gain
• Noise Rejection
• Input Impedence
• All the above

Op-amp

• is a Two input, one output device
• has High Output Impedence
• has low gain
• Both 1 and 2