Bh.Questionbanks  Electronics 
Brainheaters Questionbanks (Semester Exam) is the collection of handpicked set of questions which are mostly repeated, important and recommended. Learning this set of questions can easily help you top or even just clear the exams. Given below are Expected Questionbanks for semester.
Semester 5DC
MODULE1 1. Explain why digital communication is preferred over analog communication? (5M) 2. Write the Numerical for a convolutional encoder with code rate 1/3 and constraint length 3 and generating Vectors Draw the encoder, state diagram and trellis diagram. (5M) 3. For the bit sequence (Given) draw the following line codes: i) Unipolar RZ ii) AMIRZ iii) Manchester iv) Unipolar NRZ v)Bipolar NRZ (510M) MODULE2 1. Write the Numerical for Channel capacity (5M) 2. Write the Numerical for Construct ShannonFano code. Also find the source entropy, information rate and code efficiency. (10M) 3. State Shannon's theorem for Channel capacity. A Gaussian channel has 2MHz bandwidth. Calculate its Channel Capacity if the Signal to Noise Spectral density ratio is 10⁴. Also calculate its maximum Information Rate. (5M) 4. Write the Numerical for Construct Huffman Code, find the Entropy of the source. Obtain the compact binary code and find the Average length of the Code, Code Efficiency and Code Redundancy (10M) MODULE3 1. What is ISI? What causes ISI? Derive the expression for ISI. Explain the methods to overcome ISI. State the Nyquist’s condition for zero ISI. (10M) 2. Show the Duobinary signalling suffers from error propagation while precoded duobinary signalling does not. Explain an encoder and decoder block diagrams and decoding logic. (10M) 3. Write the Numerical for (Given) Construct the new receiver output. What should be done to avoid error propagation?(10M) MODULE4 1. Write a note on optimum receiver. (5M) 2. Why MSK is called 'shaped QPSK'? Explain. (10M) 3. Explain with the help of block diagram the transmitter, the receiver of Mary FSK. Also sketch the PSD of Mary ESK. What is the bandwidth requirement of Mary FSK? (10M) 4. Compare BASK, BPSK and BFSK, based on following parameters: Bandwidth, detection method, noise immunity, transmission rate and signal space representation. (5M) 5. Compare OQPSK and MSK. (5M) 6. Sketch the signal constellation diagram (d=2a) for 16QMA system and Derive an expression for its symbol energy, Es. Prove that noise immunity of 16QAM is better than of 16PSK system. (10M) 7. What are the properties of Matched Filter? Explain (5M) 8. Write the Numerical for Define Bandwidth efficiency. Find the required bandwidth (NulltoNull BW) of the following systems (Given). (5M) 9. Write the Numerical for With reference to OffsetQPSK, explain the following (Given) (10M) 10. With a neat diagram, explain how the Integrate and Dump Filter works as baseband receiver. Derive the expression for its probability of error. (10M) 11. Draw the signal constellation diagrams for 16PSK and 16QASKB and determine the Euclidean Distance and Expression for symbol energy, Es for both systems. Compare them and comment about which of them has better noise immunity? (10M) MODULE5 1.Write the Numerical for Find a generator matrix (Given) cyclic code using generator polynomial (10M) 2. Write the Numerical for The parity check matrix (Given) Determine the code words for the messages (10M) 3. Write the Numerical for Consider a Systematic block code (10M) 4. Write the Numerical for Design a Feedback shift register encoder (10M) MODULE6 1. Write short notes on:i) Optical communication system ii) Satellite communication system. (10M) DLIC
MODULE1 1. Write the Numerical for Determine VO / Vin for the circuit shown below: (5M) 2. Define following OP AMP parameters. 1) C.M.R.R 2) Slew rate 3) Input offset voltage 4) Input bias current 5) output resistance (5M) 3. Draw a block diagram and explain the function of each block of operational amplifier.  (10M) MODULE2 1. What are active filter? State its advantages over passive filters. (5M) 2. Draw the circuit diagram and explain the operation of differentiator. What are the limitations of Ideal differentiator? How they are overcome in practical circuit, state its application areas. (10M) 3. Design first order low pass filter using op amp at a cutoff frequency of 1 Khz, having passing band gain of 2. (10M) 4. When Bridge oscillator using op amp. (10M) 5. Design second order high pass filter using OP AMP at fo= 1KHZ and with gain at 2. (10M) 6. RC phase shift oscillator using OP AMP. (10M) MODULE3 1. Draw the circuit diagram and explain the operation of zero crossing detector. (5M) 2. Explain specifications of ADC. (5M) 3. Draw the circuit diagram and explain the operation of Precision full wave rectifier. Derive the expression of output voltage. (10M) 4. Write the Numerical for Design rectangular wave generator using opamp to have output voltage=7VPP volts, frequency 2kHZ, with supply voltage +/ 14V. (10M) 5. What are comparators? How are they classified, state applications of comparators. (5M) 6. Draw a circuit diagram of temperature compensated log amplifier and explain its operation. State its applications. (10M) 7. Design a monostable multivibrator to produce an output pulse 10 second wide. Draw a neat circuit diagram and all the waveforms. (10M) 8. Draw the circuit diagram and explain the operation of triangular wave generator using OP AMP. Explain the modifications required to obtain saw tooth wave output. (10M) 9. Schmitt trigger and its applications. (10M) 10. Instrumentation amplifier. (10M) MODULE4 1. Draw a neat circuit diagram and explain the operation of successive approximation type analog to digital converter. What are its advantages and disadvantages. (10M) 2. Draw a circuit diagram and explain the operation of parallel comparator (flash type) ADC. State its advantages and disadvantages. (10M) MODULE5 1. Draw a neat circuit diagram and explain the operation of Monostable multivibrator using IC 555. (10M) 2. Write the Numerical for Design IC 555 based symmetrical square wave generator (given) Draw waveforms for voltage across timing capacitor and output. (10M) 3. PLL( phase lock loop) and its application. (10M) MODULE6 1. Write the Numerical for Design voltage regulator (Given) (10M) 2. Functional block diagram and working of IC 723. (10M) 3. Draw the block diagram and explain the operation of switching regulator. (5M) 4. Explain with circuit diagram. 1) short circuit protection 2) fold back current limiting in 723 IC voltage regulator. (10M) EEM
MODULE1 1. Write the Numerical for Find out net force on (Given) (5M) 2. Derive the wave equation for time varying Harmonic fields in free space. (5M) 3. Write the Numerical for Boundary conditions for Static electric and magnetic fields. (10M) 4. Write the Numerical for Gauss’s law, OR BiotSavart's law (510M) 5. Write the Numerical for, Poisson’s and Laplace equations (10M) 6. Write the generalized maxwell's equation in point form and integral form. (5M) 7. Derive the Poisson and Laplace's equations. (5M) 8. Write the Numerical for Coulomb's law OR Ampere’s law (Given). (5M) MODULE2 1. Derive the boundary conditions for Electric and Magnetic fields at the boundary of two dielectric media. (10M) 2. Write the Numerical for Transmitted wave. (10M) 3. State Poynting theorem and derive an expression for Poynting vector. Explain the power terms mentioned in the derivation. (10M) 4. Write the Numerical for Starting with Maxwell's equations derive the expression for the wave equation for an electromagnetic wave propagating in a perfect dielectric. (5M) 5. Write the Numerical for Define and explain skin depth. Derive the expression for the skin depth. Calculate the skin depth and the velocity of propagation for a uniform plane wave(Given) (10M) MODULE3 1. Compare MOM, FDM and FEM. (5M) 2. Write the Numerical for Use the iterative final method and band Matrix method to calculate potential at nodes 1 and 2 in the figure shown below: (10M) 3. Explain the Dirichlettype, Neumanntype and mixed boundary conditions. (5M) 4. Use the finite difference method to calculate the potentials at nodes 1 and 2 in the potential system shown in figure using iteration method and band matrix method. (10M) MODULE4 1. Write the Numerical for Explain beam width of an antenna. An antenna has a field pattern (Given) Find its half Power width. (5M) 2. Explain the concept of retarded potential. (5M) 3. Derive the relationship between effective area and Directivity. (5M) 4. Explain the radiation intensity, directivity and directive gain of the antenna. (5M) 5. Derive the expression for radiation resistance in far field region of an infinitesimal dipole. (10M) 6. Write the Numerical for Find the directive gain and directivity(Given) 7. Write the Numerical for An antenna has a field pattern (Given) Find the half power beamwidth and the first null beamwidth. (10M) MODULE5 1. Write the Numerical for Define critical frequency and MUF. Calculate the critical frequency where the maximum value (given) (5M) 2. Write the Numerical for A distortion less line (Given) (10M) 3. Explain the factors affecting the field strength of space wave signal next. (5M) 4. Explain sky wave propagation and Write the Numerical for Calculate the skip distance for flat earth (given) (10M) 5. What is line of sight propagation? Obtain expression for range of line of sight for space wave propagation in terms of antenna's transmitting and receiving heights. (10M) MODULE6 1. Write the Numerical for Use Smith chart to find the reflection coefficient, VSWR, the input impedance at the source. (5M) 2. Write the Numerical for Find the characteristic impedance and propagation constant of a transmission line (5M) 3. Derive an expression for the input impedance of a transmission line. (10M) MCA
MODULE1 1. Write the Numerical for Assume that the stack pointer points to memory location 3FH and the contents of the memory location 30H,31H and 32H are 00, 88 and FF respectively. Illustrate the stack contents after the execution of each of the following instructions. (Given) (5M) 2. Internal memory organization of 8051. (4M) 3. Significance of GATE pin of 8051. MODULE2 1. Explain following instructions of 8051 i) INC@RO ii) MOVX A, @RI iii) ACALL address iv) DRC A v) SRY direct, data. (5M) 2. A switch is connected to pin P2.0 and an LED to pin P1.7. Write a program to get status of the Sweat and send it to the LED. (5M) 3. Ten 8 bit numbers are stored in internal data memory for location 50H. Write a program to increment the data. (5M) 4. Explain various addressing modes of 8051 with examples. (10M) 5. Write an assembly language program to generate a delay of 100 msec. (5M) 6. Assembler directives in 8051.(4M) 7. Justify why the ports of 8051 are initialised to FFH when operating in input mode. (5M) 8. Write the Numerical for the instructions to access the On chip program memory, On Chip Data Memory, External Data Memory, instruction to Modify bit addressable area respectively. what is difference between MOV 20h,#01h and SETB 20H instructions. (5M) MODULE3 1. Write a program to transfer message 'NO' serially with baud rate of 9600 continuously. (10M) 2. Explain various timer modes of 8051. (10M) 3. Interrupts in 8051. (4M) 4. Write the Numerical for Calculate the relative address for the label "BACK" in the following program. (Given) (10M) 5. Write a program to generate a wave with on time 4ms and off time 6ms on port pin P1.5. Use Crystal Frequency =22MHz. (10M) 6. Explain the interrupt structure of 8051 and related registers used. (10M) 7. Application of Timer/Counter Mode of 8051. MODULE4 1. Show interfacing of DC motor to microcontroller. (5M) 2. Explain interfacing of stepper motor to 8051 and write an assembly language program to rotate it in a clockwise direction. (10M) 3. Write an assembly language program for 8051 to display predefined message of LCD. (10M) 4. Interfacing ADC to 8051.(4M) 5. Write a program to transmit message "Mumbai" serially at 9600 Baud Rate. Show the Baud Rate Calculation. (10M) 6. Write a program to generate a "Triangular wave" if SW1=0 and Ramp wave if SW1 = 1. Using DAC0808. (10M) 7. Write a program to display the temperature value obtained from the sensor LM35 connected to channel 3 of ADC 0808. (10M) 8. Write a program to rotate a stepper motor continuously using half step 8 sequence. Assume the value stored in the Lookup Table stored at address 0400H. (10M) MODULE5 1. What is Thumb2 mode of operation of cortex M3? State its advantages. (5M) 2. Explain various operating states of cortex M3 with thread and handler modes. (10M) 3. Explain register architecture of cortex M3. (10M) 4. NVIC in cortex M3. (4M) 5. Justify the statement “ARM Cortex M3 has reduced Power Consumption”. (5M) 6. Explain the programmer's model and operating modes of ARM cortex M3. (10M) 7. Explain how interrupt latency is reduced in ARM cortex M3. (10M) 8. MMU of ARM of Cortex M3. 9. IP Register. Semester 6CCN
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