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Lic 100 Marks QP

This document contains questions for an exam on Linear IC's and Applications. It covers various topics like operational amplifiers, filters, voltage regulators, timers and digital to analog converters. Some of the questions ask students to explain circuits, derive equations, design amplifiers, filters and regulators that meet specific requirements. Students are asked to sketch circuits, explain operations and working principles of components like op-amps, voltage regulators, timers and DACs. They are also asked to solve design problems by meeting given voltage, current, frequency and duty cycle specifications.

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54 views2 pages

Lic 100 Marks QP

This document contains questions for an exam on Linear IC's and Applications. It covers various topics like operational amplifiers, filters, voltage regulators, timers and digital to analog converters. Some of the questions ask students to explain circuits, derive equations, design amplifiers, filters and regulators that meet specific requirements. Students are asked to sketch circuits, explain operations and working principles of components like op-amps, voltage regulators, timers and DACs. They are also asked to solve design problems by meeting given voltage, current, frequency and duty cycle specifications.

Uploaded by

profharishjoshi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
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USN

Fourth Semester B.E. Degree Preparatory Examination, June/July 2016


LINEAR ICs & APPLICATIONS
Time :3hrs

10EC46

Max Marks :100


Note: 1.Answer all five questions
2. Each question carries 20 Marks
3.Missing data may be assumed
PART-A

a. With a neat circuit diagram explain the direct coupled inverting amplifier. Also design an inverting amplifier
using 741op-amp. The voltage gain is to be 75 and the output voltage amplitude of 3V. (I b max=500nA)(06 Marks)
b. Explain the basic circuit of operational amplifier with Vee=Vcc=15v, R c = 68k, RE=220k.
(05 Marks)
c. Define the following with equations and proper units
i)CMRR
ii)SLEW RATE iii)PSRR iv) Output Offset Voltage
(04 Marks)
d. Sketch the circuit of a two input non inverting summing amplifier, and Explain the operation of the circuit and
derive the equation for the o/p voltage when V2=5v ,V1=2v for an op-amp 741.
(05 Marks)

a. Sketch the circuit of a capacitor coupled voltage follower using single polarity supply and explain its
operation.
(06 Marks)
b. A capacitor coupled Non inverting amplifier using 741 op-Amp has A v 100 & Vo = 5 V.
The load resistance
is 10 k and the lower cut-off frequency is to be 100 Hz. Design a suitable circuit.
(08 Marks)
c. Explain with circuit the operation of high Z in CC non-inverting amplifier and show that input impedance is
very high as compared to CC non-inverting amplifier
(06 Marks)
PART-B

a. Design a op-amp based monostabe multivibrator to generate a pulse width of PW = 4ms. The trigger is a pulse
of amplitude 6V and duration of 75 S. Use bi polar op-amp and a supply of

(08 Marks)

b. With a neat circuit diagram, waveform design an inverting Schmitt trigger to have UTP=6V, LTP=-3.5V using a
bipolar op-amp and a 18V supply.
(06 Marks) c.

Sketch the circuit of a second order high pass filter and explain its working. Also design a circuit for the
same for a cut off frequency of 5 KHz.
(06 Marks)
4

a. Explain the working of series voltage regulation with current limit protection
(05 Marks)
b. Mention the advantages of IC voltage regulators. Draw the internal schematic for IC 723 regulator
briefly explain its working.Also Design a voltage regulator circuit to obtain Vo = 5V and Io = 2A.(07 Marks)
c. With a neat block diagram explain the working principal switching regulator, mention its advantages and
disadvantages
(08 Marks)

a. With a neat block diagram explain the operation and characteristics of 555 Timer.
b. Design an astable multivibrator using 555 Timer of frequency 5 K Hz at 60% duty cycle.
c. With a circuit diagram briefly explain the working of R-2R ladder DAC.
d. With a neat block diagram explain the operation VCO.

(05 Marks)
(05 Marks)
(05 Marks)
(05 Marks)

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