02000EC204052004

Pages: 2

Reg No.: Name:

Max. Marks: 100

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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fourth semester B.Tech examinations (S), September 2020

Course Code: EC204
Course Name: ANALOG INTEGRATED CIRCUITS (AE, EC)

PARTA

Answer any two full questions, each carries 15 marks.
How a constant current bias circuit can be used to improve the CMRR of a
differential amplifier?
Define slew rate. What causes slew rate? Derive the equation for maximum input
frequency at which an undistorted signal is obtained in terms of slew rate?
Explain with suitable diagram how voltage shunt feedback is implemented in op-
amp based circuits and derive the following characteristics (i) Closed loop
voltage gain (ii)Input resistance, (iii) Output resistance (iv)Bandwidth
A 7410 op-amp is used as an inverting amplifier with a gain of 50. The voltage
gain vs frequency curve of 741C is flat upto 20kHz.What maximum peak to peak
input signal can be applied without distorting the output.
List and explain the function of all the basic building blocks of an op-amp.
What is the principle of operation of Wilson current mirror and its advantages?
Deduce the expression for its output current.

PART 8

Answer any two full questions, each carries 15 marks.
Design a second order Butterworth low-pass filter with an upper cutoff frequency
of 1kHz.
Explain the working of an inverting Schmitt trigger and draw its transfer
characteristics.
Draw the circuit of a temperature compensated logarithmic amplifier and show
that it provides temperature independent logarithmic output.
Draw and explain the working of a practical differentiator and analyze its

frequency response.

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Duration: 3 Hours

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