Design with Linear Integrated Circuits - May 2015

Electronics Engineering (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) What is the need of input offset voltage compensation and how it can be achieved.(5 marks) 1 (b) Design RC phase shift oscillator to produce sinusoidal output of 5KHz.(5 marks) 1 (c) Design schmitt trigger circuit to achieve upper and lower threshold voltage as 1.5 volts.(5 marks) 1 (d) Explain Resolution, Accuracy and settling time with respect to DAC.(5 marks) 1 (e) Design a Flasher circuit using IC 555, in which lamp should remain on for 4 sec and off for 2 sec.(5 marks) 2 (a) Derive closed loop parameters for Inventing opamp.(10 marks) 2 (b) Design a second order KRC low pass filter with a cut off frequency fo=2KHz and Q=5.(10 marks) 3 (a) Design a triangular wave generator to get the output frequency of 1.5 Khz and V_o(p-p)=7.5 V using IC 741.(10 marks) 3 (b) Explain counter type ADC with neat diagram.(10 marks) 4 (a) Calculate output voltage for the given amplifier. (10 marks) 4 (b) (i) Prove that opamp can be used as current to voltage converter.(4 marks) 4 (b) (ii) Compare normal rectifier with precision rectifier.(3 marks) 4 (b) (iii) Define different parameters of PLL.(3 marks) 5 (a) Explain diferent comparators, state different applications and suggest modifications for practical comparator.(10 marks) 5 (b) What are different possible IC 723 based voltage regulators. Design Voltage regulator to achieve V_o=12V and I_o=1 Amp.(10 marks) 6 (a) Explain function of each block of PLL.(10 marks) 6 (b) Design voltage Regulator using IC LM317 for the given specifications.
V_o= 12&plumn;3 volts and 1L=100 mA.(10 marks)