Cochin University of Science and Techology (CUST) 2006 B.Tech Electronics and Communications Engineering Microelectronics and integrated circuits - Question Paper

Maximum Marks: 100

I Explain the basic processes used to fabricate the ICs using planar technology    (20)

OR

II- (a) Explain the arrangement of transistor with Schottky barrier diode in an IC.    (10)

(b) Explain about the process of n - channel MOSFET fabrication in an IC.    (10)

Hi. (a) Explain about the following thin Him deposition processes :

(i) Cathode sputtering (ii) Plating techniques.    (8)

(b) Explain the working of difference amplifier using opamp.    (12)

OR

IV.    (a) Explain the working of differential amplifier using Darlington pair.    (12) (b) Discuss the effects of bias curTcnt and offset voltage in an opamp.    (8)

V.    (a) Explain the operation of JFET input opamp.    (10) (b) Explain how the opamp is used as Instrumentation amplifier.    (10)

OR

VI.    (a) Explain the operation of Log amplifier with diode connected transistor.    (10) (b) Explain the working of small signal half and fill) wave rectifiers using opamp.    (10)

VII.    (a) Explain the working of Regenerative comparator.    (10) (b) Explain the functional diagram of tow voltage regulator using IC723.    (10)

OR

Vlll (a) Discuss the difference between Chebychev and Butterworth filters.    (6)

(b)    Explain the working of second order Butterwoth HPF and determine its design parameters for the cut-off frequency of 5 KHz.    (1 0)

(c)    What is meant by frequency scaling?    (4)

IX.    Explain the operation of Integrating type ADC with neat diagram.    (20)

OR

X.    (a) Explain the following applications of PLL:

(i) Frequency multiplier (ii) AM Demodulator.    (10)

(b) Explain the working of PLL with help of block diagram.    (10)

Attachment: cochin-university-of-science-and-techology--cust--2006-b-tech-electronics-and-communications-engineering-37113-1.JPG

Earning:   Approval pending.