Department Of Electronics

Title :Electronic Devices and circuits Important questions. Unit :1    (PN JUNCTION DIODES )   Essays: 1.Explain the construction , working and V-I characteristics of PN junction diode?   2.Explain the construction , working and V-I characteristics of Tunnel diode? 3.Explain the construction , working and V-I characteristics of Zener diode? Shorts: 4. Explain the construction, working and V-I characteristics of Varactor diode? 5. Write a short note on Tunneling effect? 6. Discuss the effect of temperature on reverse saturation current? 7. Write a short note on Barrier potential? 8. Explain Zener diode acts as a voltage regulator? 9. Define diode current equation? Unit :2   (BJT and its Biasing ) Essays: 1. Explain the construction, working and V-I characteristics of CB Amplifier (or) Draw the experimental arrangement of CB Amplifier and explain? 2. Explain the construction, working and V-I characteristics of CE Amplifier (or) Draw the experimental arr

ANALOG AND DIGITAL IC-APPLICATIONS IMPORTANT QUESTIONS UNIT 1: (OPERATIONAL AMPLIFIERS) ESSAYS: 1. Define an op-amp ? what are the ideal   characteristics of an op-amp and explain the      block diagram of an op-amp? 2. Explain the working of inverting and non-inverting op-amp? 3. Explain the working of integrator and differentiator op-amp ? 4. Explain the   op-amp acts as logarithmic amplifier and differential amplifier ? 5. Explain the   op-amp acts as summing amplifier and subtractor amplifier ? 6. Explain the op-amp parameters ? SHORTS: 7.   Explain the concept of virtual ground ? 8. Explain the   op-amp acts as voltage follower ? 9. Explain the   op-amp acts as voltage to current convertor ? 10. Explain the working of   non- inverting adder op-amp? UNIT 2: (OP-AMP CIRCUITS) ESSAYS: 1.Explain the working of Astable multivibrator (or) free running multivibrator              by using op-amp ? 2. Explain the working   and analysis of Monostabl

MICRO CONNTROLLERS AND INTERFACING IMPORTANT QUESTIONS UNIT-1. ESSAYS: 1 . Difference between micro processor and micro controller? 2 .Explain the 8051 micro controller development tools? 3 .Explain the evaluation of micro controllers? SHORTS: 4 . Write a short note on compiler? 5.Write a short note on simulator? 6.Write a short note on Debugger? 7.Write a short note on Assembler? UNIT-2. ESSAYS: 1. Draw the block diagram of 8051 micro controller and explain each block? 2.Explain the architecture of 8051 micro controller? 3.Draw the pin diagram of 8051 micro controller and explain each pin? 4.Explain the memory organization of 8051 micro controller? 5.Explain the interrupt structure of 8051 micro controller? 6.Explain about the timer/counter   mode operation of 8051 micro controller? SHORTS: 7 . Write a short note on register banks and stack? 8.Write a short note on data types and directives? 9.Write a short note on program status word (

    8051    MICRO CONTROLLER PIN DESCRIPTION The pin diagram of 8051 microcontroller looks as follows − ·          Pins 1 to 8  − These pins are known as Port 1. This port doesn’t serve any other functions. It is internally pulled up, bi-directional I/O port. ·          Pin 9  − It is a RESET pin, which is used to reset the microcontroller to its initial values. ·          Pins 10 to 17  − These pins are known as Port 3. This port serves some functions like interrupts, timer input, control signals, serial communication signals RxD and TxD, etc. ·          Pins 18 & 19  − These pins are used for interfacing an external crystal to get the system clock. ·          Pin 20  − This pin provides the power supply to the circuit. ·          Pins 21 to 28  − These pins are known as Port 2. It serves as I/O port. Higher order address bus signals are also multiplexed using this port. ·          Pin 29  − This is PSEN pin which stands for Program