Analog Circuits (EC-405) - Important Questions

Explain the concept of feedback and its types, including amplifier with negative feedback and its advantages with examples.

Explain the four feedback topologies: voltage-series, current-series, voltage-shunt and current-shunt with neat diagrams.

Draw the RC phase-shift oscillator circuit, explain its working and derive the expression for frequency of oscillation.

State and explain the Barkhausen criterion for sustained oscillations and its importance.

What is an integrated circuit (IC)? Explain its characteristics and relative advantages and disadvantages over discrete assembly.

What is understood by IC data sheets? Explain their importance and what type of information can be collected from them.

Discuss the differential amplifier, its advantages and applications.

Define op-amp DC performance parameters: input offset voltage, input bias current, input offset current, output offset voltage, thermal drift, and explain their effect on accuracy.

Draw the equivalent circuit of an ideal op-amp and the pin diagram of IC-741, explaining the function of each pin.

With neat sketch explain the operation of op-amp as integrator and differentiator.

Describe the voltage-series feedback amplifier configuration and its characteristics.

Explain and design first-order Butterworth low-pass filter using op-amp, including circuit diagram, gain and frequency response.

Draw the astable multivibrator circuit diagram using IC-555 timer and explain its working.

Describe the working of monostable multivibrator using IC-555 timer.

Explain the operation, comparison, and advantages/limitations of fixed versus adjustable voltage regulators.

Explain the operation of Schmitt trigger circuit using 555 timer with neat diagram.