Basic Electronics (3110016)

BE | Semester 1 
  Winter - 2019|06-01-2020
Total Marks 70

Q1 (a) Draw the circuit diagram of Half wave rectifier.

 Unit : Diode theory and applications |  Topic : Half wave rectifier

Q1 (b) Explain the bridge rectifier with diagrams.

 Unit : Diode theory and applications |  Topic : Bridge rectifier

Q1 (c) Determine the Vo for the network shown in below figure.

 Unit : Diode theory and applications |  Topic : Clipping circuit

Q2 (a) Explain Varactor diode and varistor.

 Unit : Special purpose diodes and transistors

Q2 (b) Why Zener diode can be used as voltage regulator? Explain Zener as voltage regulator with necessary diagram.

 Unit : Special purpose diodes and transistors |  Topic : Zener diode circuit for voltage regulation

Q2 (c) Compare the logic families and explain any one of them.

 Unit : Field effect transistors (FET) and its biasing

OR

Q2 (c) Explain Ex-OR and Ex-NOR gate with truth table and construct OR gate using diodes.

 Unit : Digital |  Topic : Basic gates AND, OR,NOT, NAND, NOR, EX-OR, EX-NOR

Q3 (a) Explain about DC load line and Bias point of transistor.

 Unit : Bipolar junction transistors and its biasing |  Topic : DC load line and bias point

Q3 (b) Explain the working of PIN Diode.

 Unit : Special purpose diodes and transistors |  Topic : PIN diode

Q3 (c) Briefly explain the h-parameters and draw h-parameter based equivalent circuit for CE transistor and derive an equation for input impedance, output impedance, and voltage gain.

 Unit : AC Analysis of BJT circuits and small signal amplifier |  Topic : Transistor models and parameters

OR

Q3 (a) Write truth table of AND, NAND and NOR gates.

 Unit : Digital |  Topic : Basic gates AND, OR,NOT, NAND, NOR, EX-OR, EX-NOR

Q3 (b) Explain the selection of a Q point for a transistor bias circuit and discuss the limitations on the output voltage swing.

 Unit : AC Analysis of BJT circuits and small signal amplifier |  Topic : AC load lines

Q3 (c) Explain the difference between clipping and clamping circuit. A positive voltage clamping circuit and a positive voltage clipping circuit each have ±12 V square Wave input. Sketch the output waveform for each circuit.

 Unit : Diode theory and applications

Q4 (a) Draw voltage multiplier circuit.

 Unit : Diode theory and applications |  Topic : Voltage multiplier circuit

Q4 (b) Explain Transconductance and switching in FET.

 Unit : Field effect transistors (FET) and its biasing |  Topic : Transconductance

Q4 (c) Explain the Depletion region and drain characteristics of n channel JFET.

 Unit : Field effect transistors (FET) and its biasing |  Topic : JFET characteristics

OR

Q4 (a) Discuss about VI characteristics of Ideal Diode.

 Unit : Diode theory and applications |  Topic : Ideal diode

Q4 (b) Explain FET as an Amplifier.

 Unit : Field effect transistors (FET) and its biasing |  Topic : Amplification and Switching

Q4 (c) Determine the voltage Vo for the network of below Figure. Give an explanation for your answer.

 Unit : Diode theory and applications |  Topic : Basic idea about forward bias, reverse bias and VI characteristics

Q5 (a) Explain the working of Transistor as Switch.

Q5 (b) Write a short note on E MOSFET as an Amplifier.

 Unit : Field effect transistors (FET) and its biasing |  Topic : E-MOSFET amplifier

Q5 (c) Design a series noise clipping circuit which rectify the noise signal with amplitude lower than ±VF.

 Unit : Field effect transistors (FET) and its biasing |  Topic : JFET characteristics

OR

Q5 (a) Explain the AC load line of a transistor.

 Unit : AC Analysis of BJT circuits and small signal amplifier |  Topic : AC load lines

Q5 (b) Draw and explain seven segment display.

 Unit : Special purpose diodes and transistors |  Topic : Seven Segment display

Q5 (c) Compare BJT with FET and explain D MOSFET.

 Unit : Field effect transistors (FET) and its biasing |  Topic : Comparison of BJT and FET