Integrated Circuits - Dec 2011

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 with grounded load(5 marks) 1 (b) Explain requirements of an instrumentation amplifier(5 marks) 1 (c) Explain Flash ADC(5 marks) 1 (d) Explain muliplier characteristics(5 marks) 2 (a) Draw the internal block diagram of IC XR 2206 and explain it(10 marks) 2 (b) Draw the circuit of basic integrator using op-amp. Find expression for output voltage. Explain disadvantage of basic integrator(10 marks) 3 (a) Design a multiple feedback low pass filter with H₀=3, F₀=5 KHz and Q=6 (10 marks) 3 (b) Explain internal block diagram of IC 555 with monostable mode. Explain one application of it.(10 marks) 4 (a) Draw the circuit of instrumentation amplifier with dual op-amps. Find expression for the output voltage(10 marks) 4 (b) Design an astable using 555with output frequency 1 KHz with 60% duty cycle. Modify the circuit design to obtain 1 KHZ output frequency with 40% duty cycle(10 marks) 5 (a) Write the VHDL code for simple 4-bit counter with Rising Clock Edge and Asynchronous Active Low clear input(10 marks) 5 (b) Draw the block diagram of IC 565 and explain it. Also mention important electrical characteristics of 565(10 marks) 6 (a) For 5-bit R-2R ladder network with 0=0V and 1=10V. Find-
(i) Analog output due to LSB change
(ii) Full scale output voltage
(iii) Analog output for digital input 11000(10 marks) 6 (b) Design a sequential circuit using Mealy machine to detect an overlapping sequence as follows 1010(10 marks) 7 (a) Explain inverting Schmitt trigger(5 marks) 7 (b) Explain antilog amplifier(5 marks) 7 (c) Explain FPGA(5 marks) 7 (d) Differentiate between Moore and Melay circuit(5 marks)