PART A Answer ALL questions 5 x 1 = 5 1. In which region of characteristics a transistor behaves as closed switch? 2. What is faithful amplification? 3. What is buffer amplifier? 4. Write the symbol of XNOR gate. 5. Give one example for weighted code.
PART B Answer any THREE questions 3 x 2 = 6 6. Write a note on the selection of Q point. 7. Write the steps involved in drawing DC equivalent circuit of an amplifier. 8. Define class B and class C power amplifiers. 9. Convert the SOP Boolean expression Y = AB + BC + ABC into canonical form. 10. Write the logic circuit of D flip flop using only NAND gates.
PART C Answer any THREE questions 3 x 3 = 9 11. Define the terms – Thermal runaway, Heat sink and Leakage current. 12. Write any one application of CE, CB and CC amplifier. 13. Why do we express the gain in decibels? 14. Write the logic circuit and Boolean expressions for half subtractor. 15. What is race around condition? How is it eliminated?
