Sketch the characteristics of ideal diode and approximate characteristics of practical diodes. Briefly explain it.
[3 marks]Draw two-diode full-wave rectifier circuit and explain its operation.
[4 marks]Explain positive and negative voltage clamper circuit with waveforms.
[7 marks]What are three modes of transistor operation, explain it.
[3 marks]What is you understand by transistor biasing and why it is required.
[4 marks]Compare CB, CE and CC configuration.
[7 marks]Explain the operation of voltage divider bias circuit using an npn transistor and write its voltage and current equation.
[7 marks]What is photo-diode and how it works?
[3 marks]What is varactor diode, and explain how it works?
[4 marks]In CE amplifier has h =2.1 KΩ, h = 75 and h =1 µS, voltage divider ie fe oe resistance R = 68 kΩ and R = 56 kΩ, Rc=3.9 kΩ, R = 4.7 kΩ and R = 82 1 2 E L kΩ. Calculate input impedance, output impedance and voltage gain.
[7 marks]What is tunnel diode, and explain how it works?
[3 marks]Explain how Zener diode maintains constant voltage across load with circuit.
[4 marks]Draw single stage CE amplifier and analyze and explain how it works.
[7 marks]Define saturation current, pinch off voltage and transconductance in JFET.
[3 marks]Do comparison between BJT and FET and write it.
[4 marks]Analyze and explain CB amplifier and find its input impedance, output impedance and voltage gain
[7 marks]Define performance parameter of JFET a.c. drain resistance, trnasconductance and amplification factor.
[3 marks]In n-channel JFET with V =-6 Vand I = 3 mA Solve Ivalue for GS(off) DSS D V =-1,-3, and -5 V. GS
[4 marks]Consider a CB amplifier utilizing a BJT biased at Ic= 1 mA with Rc = 5 kΩ, R = 5 kΩ. Determine Rin, Avo, Av, and Ro. L
[7 marks]What is logic gates and state the rule used for OR and AND gate.
[3 marks]Why NAND and NOR gates are called universal gate and draw truth table of NAND gate.
[4 marks]Write and explain application of FET as amplifier and as a switch.1
[7 marks]Draw the logic circuit for the Boolean expression Y = ABC + D.
[3 marks]Explain Transistor Transistor Logic (TTL).
[4 marks]Using common source circuit have a R =5.6 MΩ, R = 1 MΩ, R =R = 2.7 1 2 D S KΩ, rd = 100 KΩ and Y = 3000 µS calculate input impedance, output fs impedance and voltage gain.
[7 marks]