What is a diode? Write its types and applications.
[3 marks]Explain the diode V-Icharacteristics of ideal and practical PN junction semiconductor diode.
[4 marks]Enumerate the different types of clipping circuits with their different names and input-output waveforms.
[7 marks]Why are junction transistors called bipolar devices?
[3 marks]The metal lead of the p-side of a p–n diode is soldered to the metal lead of the p-side of another p–n junction diode. Will the structure form an n–p–n transistor? If not, why?
[4 marks]Sketch the circuit of the common collector mode of BJT and its output characteristics. Derive the expression for the collector current and gain.
[7 marks]Draw the fixed-biased circuit by considering an n–p–n transistor in the CE mode. Derive the expressions for stability factors. What are the functions of the coupling capacitors?
[7 marks]Write a short note on the optocoupler device?
[3 marks]Explain the sixteen segment display and its applications with the necessary circuit diagram.
[4 marks]Draw the approximate hybrid model for any transistor configuration at low frequencies. Show that only h and h are essential in the model. Is the ie fe approximation justified?
[7 marks]Explain the varactor diode.
[3 marks]Explain the contraction of the solar cell with its operational principle.
[4 marks]What is self-bias? Draw the circuit showing self-bias of an n–p–n transistor in the CE mode. Explain physically how the self-bias improves stability.
[7 marks]What is MOSFET device? Draw its construction diagram.
[3 marks]Write short notes on the following :
[4 marks]Advantages of JFET (ii) Difference between MOSFET and JFET
[ marks]Compare the different characteristics of the following semiconductor devices: bipolar junction transistor, field-effect transistor.
[7 marks]How will you determine the drain characteristics of JFET? What do they indicate?
[3 marks]Explain the common drain configuration for a JFET.
[4 marks]Explain the JFET parameters and establish the relationship between them1
[7 marks]What is the thermal runaway in transistors, and how can it be avoided?
[3 marks]What is an Early effect, and how can it account for the CB input characteristics?.
[4 marks]What do you mean by the logic gate and its types? Explain the universal logic gates.
[7 marks]What is the ac load line in the transistor? Write its significance.
[3 marks]The value of alpha increases with the increasing reverse-bias voltage of the collector junction. Why?
[4 marks]Explain the logic families and their types. Describe the characteristics of the same.
[7 marks]