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# Amity University 2008 B.E Electrical and Electronics Engineering EC 1313 –LINEAR INTEGRATED CIRCUITS - Question Paper

Tuesday, 15 January 2013 07:15Web

C3249
B.E/B.Tech DEGREE EXAMINATION,NOVEMBER-2008
5th SEMESTER
(Regulation 2004)
Electrical and Electronics
EC 1313 –LINEAR INTEGRATED CIRCUITS
PART-A
1.Define the term epitaxial growth
2.what is meant by dielectric isolation in IC fabrication?
3.draw the ckt diagram of an opamp integrator.mention its application
4.compare ideal and practical characterstics of an opamp
5.what is a zero crossing detector?
6.which is the fastest ADC?give cause
7.mntion the application of analog multiplier
8.draw the block diagram of PLL as frequency multiplier
9.what is an optocoupler?
10.mention the advantage of an isolation amplifier

PART-B
11.a) 1. write the sample diagram.explain the technique of monolithic ICS
2. how resistors are made in monolithic ICS?
Or
b) 1. discuss various kind of photolithographic process
2. how a pn junction diode is formed in IC fabrication
12. a) 1. Draw the schematic of an emitter coupled differential
amplifier.Explain why the CMRR tends to infinity for a symmetric
ckt with emitter resistance becomes infinity
2. compute the output voltage v0 of the ckt shown

Or
b)1.How is a log amplifier realized with an opamp?
2. Determine the outputvoltage for the subsequent ckt

13. a)1.with the ckt diagram discuss the working of instrumentation amplifier
2.Explain the subsequent applications of opamp
i. Peak detector
ii. V/I converter

Or
b)1. Design a 2nd order active hgh pass filter for a cutoff frequency of 5KHZ
2. discuss the function of flash A/D converter
14. a)1. Design an astable multivibrator having a duty cycle of 40% with a frequency of
1KHZ
2.write a note on analog multiplier
Or
b)1.Explain the functional block diagram of PLL IC565
15 a)1. discuss the working ICL8038 function generator
Or
b)1. explain the functional diagram of IC723 series regulator
2. write short notes on protective circuits in regulators