Analog Circuit Design — Summer 2018

Define the following parameters of Op-Amp:

Slew Rate (ii) Common Mode Rejection Ratio. (iii) PSRR

Draw Hybrid - π equivalent circuit for CE transistor. Also derive the equation of transconductance g . m

Explain application of op-amp (Inverting configuration) as summing, scaling and averaging circuit.

Sketch equivalent circuit of crystal and discuss its application in oscillator circuit. Draw crystal based oscillator circuit.

Design RC phase oscillator for the frequency of 3KHz.

What is an oscillator? Explain the concept of oscillation with Barkhausen criteria.

Draw op-amp based Wien-bridge oscillator circuit and obtain its frequency of oscillation.

List out characteristics of ideal op-amp.

Draw BJT based emitter coupled differential amplifier circuit. How can we improve its CMMR?

Draw peaking amplifier. Specify the value of all components to provide a gain of 10 at a peak frequency of 16 KHz. Take L = 10mH with internal resistance of 30 Ω.

What are the problems associated with op-amp based basic differentiator circuit? Suggest possible solution.

Explain the requirement of Instrumentation amplifier.

Explain the operation of op-amp based sample and hold circuit and state its application.

What is thermal drift? How does it affect the performance of an op-amp circuit?

Define and explain the ‘Lock range’ and ‘Capture range’.

Design a free running ramp generator using IC 555 for V =10V, C= 0.1µF cc and period T = 2ms. Take transistor with ß = 100. Explain its working.

What do you understand by precision rectifier? Draw half wave precision rectifier circuit.

Sketch the circuit of FM detector using PLL and explain its working.

Design an astable multivibrator using IC555 with repetition frequency of 1KHz and duty cycle 70%. Assume C=0.1µF. Draw designed Circuit and waveforms.

Explain zero crossing detector with circuit diagram and waveforms.

State the advantages and disadvantages of SMPS.

Design a Delyiannis-Friend circuit with f = 12.5KHz, Q=10 and mid band0 gain H =26dB.

Discuss magnitude scaling and frequency scaling in filter design.

Comparison of linear and switching mode regulators.

Design a 1.5KHz low pass second order Butterworth filter, Use the Sallen and Key equal component model. Assume the damping factor to be √2.