JNTU
JNTU B.Tech III LINEAR AND DIGITAL IC APPLICATIONS Previous Question Paper (August/September - 2024 - R13)
Note: i) Question paper consists of Part A, Part B.
ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions.
iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What are the practical difficulties associated with the integrator circuit?
Answer
The primary practical difficulty with a basic op-amp integrator is the offset voltage at the input, which is amplified by the gain of the integrator. Over time, this causes the output to drift toward the positive or negative saturation voltage, effectively acting as an open-loop amplifier for DC signals. Additionally, input bias currents flow through the feedback capacitor, causing it to charge continuously and further contributing to output saturation errors.
Write about zero crossing detector.
Answer
A Zero Crossing Detector (ZCD) is an application of an operational amplifier used as a comparator to detect when an input signal crosses the zero voltage level. It converts a sinusoidal input signal into a square wave output.
The circuit operates by connecting the input signal to one terminal of the op-amp (usually the non-inverting terminal) and grounding the other terminal (inverting terminal). When the input voltage is greater than zero, the output switches to the positive saturation voltage (+Vsat). When the input voltage is less than zero, the output switches to the negative saturation voltage (-Vsat).
This circuit is widely used in applications requiring phase synchronization, frequency measurement, and time-base generation.
Define capture range and lock range in PLL.
Answer
Sign in to view the complete answer paper.
Write the advantages of active filters.
Answer
Sign in to view the complete answer paper.
Write short notes on Linearity of a converter.
Answer
Sign in to view the complete answer paper.
What is the difference between A/D and D/A convertor? Give one application of each one.
Answer
Sign in to view the complete answer paper.
Give the applications of multiplexer.
Answer
Sign in to view the complete answer paper.
Differentiate Demultiplexer and Decoder.
Answer
Sign in to view the complete answer paper.
What is a counter?
Answer
Sign in to view the complete answer paper.
Convert a T flip-flop to D flip-flop.
Answer
Sign in to view the complete answer paper.
Part B
List and explain the ideal characteristics of an operational amplifier.
Answer
Sign in to view the complete answer paper.
What is the need for frequency compensation? Discuss about pole-zero compensation.
Answer
Sign in to view the complete answer paper.
Derive the voltage gain for inverting and non-inverting op amp.
Answer
Sign in to view the complete answer paper.
Describe the working of practical differentiator circuit. Derive the expression for output voltage.
Answer
Sign in to view the complete answer paper.
Explain the operation of Mono stable multi vibrator using 555 timer.
Answer
Sign in to view the complete answer paper.
Design the first order high pass filter with pass band gain of 2 and lower cut-off frequency of 2 KHz.
Answer
Sign in to view the complete answer paper.
Draw and explain the basic block diagram of the PLL.
Answer
Sign in to view the complete answer paper.
Design a wide band pass filter having fl = 600 Hz, fh = 2 KHz and pass band gain = 4.
Answer
Sign in to view the complete answer paper.
Explain the operation of counter type A/D converter.
Answer
Sign in to view the complete answer paper.
With the necessary circuit diagram, explain the operation of R-2R ladder DAC.
Answer
Sign in to view the complete answer paper.
Explain in detail about the parallel Comparator type ADC.
Answer
Sign in to view the complete answer paper.
Draw a weighted resistor DAC and obtain the transfer characteristics of a 3 bit DAC.
Answer
Sign in to view the complete answer paper.
Elaborate the terms i) DC noise margin ii) Fan-out with reference to TTL gate.
Answer
Sign in to view the complete answer paper.
Explain the operation of binary parallel adder.
Answer
Sign in to view the complete answer paper.
What is decoder? Construct 3*8 decoder using logic gates.
Answer
Sign in to view the complete answer paper.
What is encoder? Design octal to binary encoder.
Answer
Sign in to view the complete answer paper.
Explain the master-slave flip-flop in detail.
Answer
Sign in to view the complete answer paper.
Design a Mod-6 synchronous counter using J-K flip flops.
Answer
Sign in to view the complete answer paper.
Draw and explain the working of shift right register.
Answer
Sign in to view the complete answer paper.
Discuss the architecture and applications of RAM.
Answer
Sign in to view the complete answer paper.