SRM University 2007 B.Tech Electronics and Communications Engineering BANK FOR LINEAR INTEGRATED CIRCUITS - Question Paper

42. Explain V-to-I converter and I-to-V converter in detail with a circuit diagram.
43. Explain programmable Transconductance amplifier with a neat diagrams.
44. (a) For a non inverting amplifier R1=1K?, Rf=10K?
(i) compute the maximum output offset voltage due to Vos .Given Ib =300nA, Ios=50nA,
Vos =10mv , Ios =9nA
(ii) compute the value of Rcomp needed to decrease the effect of Ib
(iii) compute the maximum output offset if Rcomp is connected in the circuit.
(b) Design an adder circuit using op-amp to get the out put expression as
Vo= - (0.1V1+V2+10V3)

45. (a) For an inverting amplifier R1=1K?, Rf=10K?
(i) compute the maximum output offset voltage due to Vos .Given Ib =300nA, Ios=50nA,
Vos =10mv , Ios =9nA
(ii) compute the value of Rcomp needed to decrease the effect of Ib
(iii) compute the maximum output offset if Rcomp is connected in the circuit.
(b) Design an adder circuit using op-amp to get the out put expression as
Vo= - (V1+5V2+10V3)
46. 13. discuss Log and antilog amplifiers using op-amp.
47. (a) discuss AC amplifiers with a neat sketch of circuit diagram.
(b) In a non inverting amplifier if R1=5KO, Rf=20KO & Vi=1V and RL=5KO is connected
at the out put. compute output voltage, Load current and closed loop gain.

UNIT – II COMPARATOR AND WAVEFORM GENERATORS
PART - A
1. What is a comparator? List the important characteristics of the comparator.
2. Draw the characteristics of an ideal comparator and practical comparator.
3. What is zero crossing detector?
4. Draw an op-amp circuit for converting a square wave into a series of positive pulses.
5. What is a Schmitt trigger? Why is it called as regenerative comparator?
6. Define VUT, VLT and Hysteresis in Schmitt trigger.
7. Give the difference ranging from basic comparator and Schmitt trigger.
8. What is a Multivibrator?
9. Draw the circuit of an astable multivibrator using op-amp.
10. What is the frequency of oscillation of an astable multivibrator?
11. Explain how a non symmetrical square wave can be obtained?
12. How do we convert a free running multivibrator to operate as a monostable multivibrator?
13. Using block schematic show a way of realizing a triangular wave generator from astable multivibrator.

Earning:   Approval pending.