Integrated Circuits - Dec 2013

Electronics & Telecomm. (Semester 5)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) Explain current amplifier.(5 marks) 1 (b) Explain switched capacitor filters(5 marks) 1 (c) Explain the log amplifier(5 marks) 2 (a) Draw the block diagram of internal architecture of XC 9500 family CPLD and explain.(10 marks) 2 (b) Explain basic requirement of instrumention amplifier and find output voltage expression for instrument amplifier using three op-amp(10 marks) 3 (a) Design astable multivibrator using 555 with output frequency 10 KHz and duty cycle 70%(10 marks) 3 (b) Explain inverting schmitt trigger and find the expression for the hystersis width for it also mention transfer characteristics(10 marks) 4 (a) Design IC 566 for frequency 10 KHz. Find change in modulation voltage if frequency is varied from 9 KHz-10KHz(10 marks) 4 (b) Write the VHDL code for synchronous decade counter with rising clocked edge and asynohronous clear input.(10 marks) 5 (a) Design a second order KRC highpass filter with cut-off frequency FO=1 kHZ and Q=5 and draw circuit diagram(10 marks) 5 (b) Explain the servo tracking tupe ADC.(5 marks) 5 (c) Explain the filter approximations(5 marks) 6 (a) Explain IC 8038 with internal block. Find the expression for duty cycle of 8038 IC(10 marks) 6 (b) Design a melay machine for overlap sequence detector for the string 1101. the output must ? when the input matches this string.
(i) Draw the state diagram
(ii) Write its transition and output table
(iii) Draw its logic diagram(10 marks) 7 (a) Explain antilog amplifier(5 marks) 7 (b) Explain sample and hold CKT(5 marks) 7 (c) Explain generalised impedance convertor(5 marks) 7 (d) Differentiate between static RAM and Dynamic RAM(5 marks)