1 (a)
Explain the basic circuit of operational amplifier.

8 M

1 (b)
Define Slew rate and unity gain band width. What is the effect of slew rate on the output voltage of an op-amp?

6 M

1 (c)
Design an inverting amplifier using op-amp 741. The voltage gain in to be 50 and the output voltage amplitude is to be 2.5V.

6 M

2 (a)
With a neat circuit diagram, explain capacitor coupled voltage followers with relevant design steps.

10 M

2 (b)
With a neat circuit diagram, explain the design of high input impedance capacitor capacitor coupled non-inverting amplifier.

10 M

3 (a)
Explain how stability of high gain amplifier and lower gain amplifier is analysed.

6 M

3 (b)
Explain phase-log compensation and phase lead compensation.

10 M

3 (c)
Determine the upper cut-off frequency for a (i) voltage follower, (ii) unity gain inverting amplifier using a 741 op-amp. Given that of 741 is 800 kHz.

4 M

4 (a)
With a neat circuit diagram, explain op-amp as precision voltage source.

10 M

4 (b)
Briefly explain non[-saturating precision half with rectifier

5 M

4 (c)
Using Bipolar op-amps with Vcc=+15V, design the high input impedance precision full wave rectifier. The input peak voltage is to be IV and no amplification is to occur.

5 M

5 (a)
A ±5, 10kHz square wave from a signal source with a resistance of 100? is to have its positive peak clamped precisely at ground level. Tilt on the output is not to exceed 1% of the peak amplitude of the wave. Design a suitable op-amp circuit for precision clamping using a supply of ±12V.

8 M

5 (b)
Briefly explain op-amp square wave/triangular wave generator with relevant circuit diagram, waveform and expressions.

8 M

5 (c)
Using a BJFET op-amp with a supply of ±12V, design a Wein bridge oscillator to have an output frequency of 15 kHz.

4 M

6 (a)
With a neat circuit diagram, waveform and expressions explain capacitor coupled non-inverting crossing detector.

8 M

6 (b)
Explain op-amp inverting Schmitt trigger for adjustable UTP and LTP.

8 M

6 (c)
Using a 741 op-amp design a first order active low pass filter have a cut off frequency of 1 kHz.

4 M

7 (a)
With a neat internal diagram of IC723, explain the functions of each block.

10 M

7 (b)
Explain basic switching regulator circuit with relevant expressions. Mention its advantages and disadvantages.

10 M

8 (a)
Explain 555 timer as monostable multivibrator with relevant circuit diagram, waveforms and expressions.

7 M

8 (c)
Explain op-amp D/A converter with R and 2R resistors.

7 M

8 (c)
Draw the block diagram of PLI and explain it.

6 M

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