MU Question Banks for EXTC Semester 4 - LIC, MC and PCE Summer exams 2025

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IMPs for LIC

List the ideal characteristics of an Operational amplifier and give the practical values of Op-Amp IC 741.
Draw the block diagram of Voltage Controlled Oscillator and explain its working.
What are the limitations of an ideal differentiator using an op-amp? Draw the circuit diagram of a practical differentiator and explain how it overcomes the limitations.
With the help of a neat diagram explain the working of R C phase shift oscillator using an op amp. Derive the expression for its frequency of oscillation.
Differentiate between Inverting and Non-Inverting Comparator
With the help of a neat diagram and waveforms at appropriate points in the circuit explain the working of square and triangular waveform generators using op amps. OR With the help of a neat circuit diagram and waveforms at relevant points in the circuit, explain the working of a square and triangular waveform generator. Derive the frequency of oscillation of the generator.
With help of a neat circuit diagram, input and output waveforms, and voltage transfer characteristics explain the working of a non- inverting Schmitt trigger.
Explain the functional block diagram of Timer IC 555.
Design an astable multivibrator having an output frequency of 1 kHz with a duty cycle of 50% using IC 555. Assume C = 0.01µF.
With the help of a functional block diagram explain the working of a Three terminal fixed voltage regulator
10,11,12 ......
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IMPS FOR MC

Compare Harvard and Von Neumann architecture.
Explain the concepts of program counter, stack and stack pointer.
Differentiate between RISC & CISC Architecture
What is the need of Cache memory? Explain in brief Cache organization
Explain cache memory.
Differentiate between: i) Static and Dynamic RAM. ii) Paging and segmentation.
Explain Interrupt Structure of 8051 microcontroller in detail. What is the role of IE, IP TCON, SCON registers in the interrupt process.
Compare microprocessor and microcontroller
Explain serial communication in 8051 with the help of SCON register.
Explain in detail with diagram ports of microcontroller 8051.

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Heres a list of IMP topics for MC :-

Addressing modes
Instruction set
Need of Assembler & Cross Assemble, Assembler Directives
Arithmetic, logical, delay subroutine , input, output, timer, counters, port, serial communication, and interrupts
Interfacing with LEDs, Relay and Keys

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IMPS FOR PCE :

Define: a) Signal to Noise Ratio, b) Selectivity, c) Sensitivity
How does the electromagnetic spectrum influence communication engineering principles?
What are the different types of communication channels in communication engineering and their characteristics?
What is low level and high level modulation?
Why is VSB amplitude modulation used in television broadcasting? OR Explain the use of VSB in broadcast television.
Explain the working of ISB receiver
How is the FET reactance modulator capable of generating FM signals ? Use a neat circuit diagram to explain the same.
Explain indirect method of FM generation with the help of relevant phasor diagrams.
Explain the necessity of de-emphasis and pre-emphasis.
Compare AM and FM

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