Linear ICs & Applications Jan 2014

I

USN068C46

Max. Marks:100

coupled inverting amplifier. Also, design an

voltage gain is to be 75 and the output voltage(10 Marks)

Fourth Semester B.E. Degree Examination, Dec.2013 lJan.2014

Linear lGs and APPlications

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Time: 3 hrs.Note: Answer FIVE full questions, selecting

at least TlyO questions from each part.

PART - Af ftr\r -'r'

I a. Define the following opamp parameters and mention their typical values for IC 7

i) Input voltage rangeii) CMRRiii) Input offset voltageiv) Slew ratev) Input impedanee.

b. With a neat circuit diagram, explain directinverting amplifier using a,741 opamp. The

amplitude is to be 3V. Is1,nu*;: 500nA.

2a.

b.

3a.

c.

4a.h.

5a.

b.

Explain a high input impedance capacitof ;oupled voltage follower, with necessary circuit

diagram. (10 Nlarks)

Oesign a capacitor-coupled inverting amplifier to operate with a +20V supply. The

minimum input signal level is, 50mV, the voltage gain is to be 68, the load resistance is

500Q, and the lower cutoff frequency is to be 2,00 Hz. Use a74l opamp. (10 Marks)

What are the effects of slew rate oni) Bandwidthii) Output amplitude and

iii) Output pulse rise time. ' (06 Marks)

With a neat eircuit diagram, explain Zin Mod technique of frequency compensu,totb. Marks)

What precautions should be observed for opamp circuit stability? Draw the necessary

With a neat circuit diagram, explain instrumentation amplifier. (08 Marks)

Explain the operatio, of high lnput impedance full-wave precision rectifier with necessary

diagram. Draw the voltage waveforms at various points in the circuit and write the

appropriate equations to show that full-wave rectification is performed. (12 Marks)

PART _ B

With a neat circuit diagram and waveforms, explain operation

waveform generator with frequency and duty cycle controls.of a triangular/rectangular

Explain and design an RC phase - shift oscillator with following specifications:

supply voltage : +15V. IC 741is to be used.

(10 Marks)fo:5 kHz,

(10 Marks).

(10 Marks)

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I

06F,.C46

6 a. Explain the operation of an inverting Schmitt trigger circuit with different UTP and LTPlevels. Discuss the design procedure and also indicate the input/output characteristics for thesame. (10 Marks)

b. Design a second-order high-pass active filter to have a cutoff frequency of 10 kHz. Use a

IBrmar): l.5prA. (l0Marks)"''lll '

7 "'"" a,. Explain the terms line regulation, load regulation and ripple rejection for a, dc voltage:. iegulator. ' i '(06 Marks)

b. W,,tthaneat schematic, explainthe salient features of 723 regulator. (08Marks)c. Expffilhe principle of operation of a switching regulator. (06 Marks)

. ..... ;

8 Write short notes on the following:a. 555 timer as mono.stable. multivibrator.b. Voltage-controlled oscillator.c. R-2R ladder Oae-,,,,,,.. .

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d. Servo tracking ADC. (20 Marks)

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Linear ICs & Applications Jan 2014

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