(a)What is thermal runaway in transistors? Obtain the condition for thermal stability in transistors. b) Design a self bias circuit using silicon transistor to achieve a stability factor of 10, with the following specifications: V = 16V, V = 0.7V, V = 8V, I = 4 mA & B = 50. CC BE CEQ CQ 5. a) Write the expressions for mid-frequency gain of a FET Common Source Amplifier. b) Discuss the high frequency response of CD Configuration. (OR) Explain the working of MOSFET in i) Enhancement mode ii) Depletion mode. Draw the necessary diagrams and graphs.