**UNIT-I**

1.a) Perform AC and DC analysis of an emitter coupled pair. [8M]

b) Draw the circuit of any one type of differential amplifier and explain the operation

2. a) Derive the Differential Amplifier- AC analysis of single input dual output

Configuration in detail. www.sureshQ.Blogspot.in

b) Explain the concept of level translator in detail.

3.a) Derive the Differential Amplifier- AC analysis of Dual input single output

Configuration in detail.

b) Explain the Properties of other differential amplifier configuration in detail.

4.a) Derive the Differential Amplifier- DC analysis of Dual input Balanced output

Configuration in detail. www.sureshQ.Blogspot.in

b) Explain the concept of Cascade Differential Amplifier Stages in detail

5.a) What is a differential amplifier? Mention the classification of differential amplifier with

neat diagrams

**UNIT-II**

1.a) Draw and explain the three open loop op-amp configurations with neat circuit

diagram. www.sureshQ.Blogspot.in

b) Explain the frequency compensation techniques of an Op-Amp.

2.a) Explain the terms (i) slew rates (ii) CMRR (iii) PSRR (iv) drift and list out ideal and

practical characteristics of above parameters.

3.b) Explain the operation of Op-amp along with block diagram in detail

b) Draw the IC 741 op-amp pin diagram and explain the function of each pin in detail.

4.a) Explain the IC 741 op-amp block diagram & its features in detail. [8M]

b) List out the applications and Temperature ranges of IC 741 Op-amp.

5.(a) Draw the pin diagram and schematic symbol of a typical OP-AMP IC741 and explain

the function of each pin. www.sureshQ.Blogspot.in

(b)For an OP-AMP, PSRR is 70dB, CMRR is 105, and differential mode gain is 105. The

output voltage changes by 20V in 4 μsec. Calculate: (i) numerical value of PSRR (ii)

Common mode gain and (iii) Slew rate

6.a) What are the differences between the inverting and non inverting terminals? What do you

mean by the term “virtual ground”?

(b) For the circuit shown below; calculate

*I**1**, I**L*and*V**0*with*R**1*=10k_,*R**f*=100k_,*V**i*=1V,*R*

*L*= 25K_.

**UNIT-III**

1.a) What are the two closed loop configurations of an Op-Amp, obtain the gains in

both the cases. www.sureshQ.Blogspot.in

b) Draw the frequency response curve of a differentiator. How is it modified when a

small resistor is connected in series with the capacitor?

2. a) Draw the circuit diagram of differentiator by using IC 741 and explain its operation. [8M]

b) Explain the summer and difference amplifier using IC 741 and explain its operation

3.a) Draw the block diagram of log Amplifiers and explain its operation in detail. [8M]

b) What are the limitations of log amplifier and how to overcome those limitations

explain in detail. www.sureshQ.Blogspot.in

4.a) Explain the operation of Square wave generators along with circuit diagram. [8M]

b) Draw the block diagram of Non- Linear function generation and explain its operation.

5.a) Draw the Instrumentation amplifier and explain its operation in detail. [8M]

b) Draw the Anti log Amplifiers circuit diagram and derive its output voltage in detail.

6.(b)For the non-inverting a.c amplifier

*R**in*=50_,*C**i*=0.1μf,*R**1*=100_,*R**F*=1k_ and*R**O*=10k_. Determine the gain & band width of the amplifier.

(b)Design a Schmitt trigger with an Op-Amp μA741 with the following specifications and

also determine the threshold voltages VUT and VLT. www.sureshQ.Blogspot.in

R1 = 100k_, R2 = 56k_, VIN(pp) = 1V and VCC = VEE = 15V

8.(a) With suitable circuit diagram explain about voltage to current converter with grounded

load and also derive the expression for the output current.

(b) Design a differentiator circuit to differentiate an input signal that varies in frequency from

10Hz to about 1kHz. Draw its output waveform, if

*Sin*[2p (1000)*t*] signal is applied.**UNIT-IV**

1.a) Design a first order wide band reject filter with a higher cutoff frequency of 100Hz

and a lower cutoff frequency of 1kHz. Calculate the Q of the filter.

b) Explain how a four quadrant multiplier be obtained from single quadrant multiplier

2.a) Draw the block diagram of Sample & Hold amplifier and explain its operation in

detail. www.sureshQ.Blogspot.in

b) Explain the operation of 2nd order band reject filter along with circuit diagram

3. Draw the 2nd order band pass filter and draw its frequency response in detail.

4.a) Draw the block diagram of balanced modulator and explain its operation in detail. [8M]

b) Draw the 2nd order band pass filter and explain its operation in detail.

5.a) Draw the circuit diagram of Sample & Hold amplifier and explain its operation in

detail.

b) Draw the circuit diagram of All pass filters and derive its output response

6.(a) Draw the circuit diagram of fourth order butter worth low pass filter using an Op-Amp.

And also draw the frequency response of it. www.sureshQ.Blogspot.in

**UNIT-V**

1a) Explain the block diagram of PLL emphasizing the capture range and lock range. [8M]

b) Design monostable multivibrator using 555 timer to produce a pulse width of

100 m sec.

b) Draw and Explain the principles and description of individual blocks of PLL in

detail.

b) Explain the terms frequency multiplication, frequency translation of PLL.

3.a) Draw the astable applications of Schmitt Trigger and explain its operation in detail. [8M]

a) Draw the block diagram of Astable operations using IC 555 and derive its time

constant.

b) Draw the circuit diagram of VCO 566 and explain its operation.) Draw the circuit diagram of FSK demodulators and explain its operation in detail.www.sureshQ.Blogspot.in

5) Draw the circuit diagram of Monostable multivibrator by using IC 555 timer and

explain its operation

6IN astable mode of 555 Timer, RA=2.2k_, RB=3.9k_ and C=0.1μf. Determine the

positive pulse width tC, negative pulse width and free running frequency f0. And also find the

duty cycle. www.sureshQ.Blogspot.in

(b)With a neat functional diagram, explain the operation of VCO and also derive an

expression for free running frequency, f0.

**UNIT-VI**

1a) Describe the operation of dual slope A/D converter with necessary diagrams. Give

some of its advantages & disadvantages.

b) How many resistors are required for an 8-bit weighted resistors D/A converter?

What are those resistor values, assuming the smallest resistance is R?

2.a) Draw the block diagram of inverted R-2R DAC and explain its operation in detail. [8M]

b) List out the DAC and ADC Specifications and compare them in detail.

3.a) Draw the block diagram of dual slope ADC and explain its operation in detail. [8M]

b) Draw the circuit diagram of weighted resistor DAC and explain its operation in

detail. www.sureshQ.Blogspot.in

4a) Draw the block diagram of successive approximation ADC and explain its operation

in detail. www.sureshQ.Blogspot.in

[8M]

b) Draw the circuit diagram of counter type ADC and explain its operation in detail.

5.a) Draw the block diagram of parallel Comparator type ADC and explain the operation

of it.

b) Draw the block diagram of R-2R ladder DAC and explain its operation.
LICA (Linear IC Applications) Unit wise Important Questions
Reviewed by Suresh Bojja
on
10/13/2016 10:16:00 AM
Rating: