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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FOURTH SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2018

Course Code: EC204
Course Name: ANALOG INTEGRATED CIRCUITS (AE, EC)
Max. Marks: 100 Duration: 3 Hours
PART A
Answer any two full questions, each carries 15 marks. Marks
1 a) Analyse the BJT differential amplifier pair under large signal operation and (8) illustrate its
transfer characteristics.
b) How to implement the instrumentation amplifier using three Op.Amp. Deduce (7) the
condition for ensuring high CMRR in the circuit?
2 a) Using the small signal analysis, deduce the expression for CMRR and (9) differential input
resistance of the BJT differential amplifier from fundamentals.
b) What is the principle of operation of Wilson current mirror and its advantages? (6)
Deduce the expression for its current gain.
3 a) Deduce the expression for the closed loop voltage gain, input resistance and (10) output
resistance for an op. amp. with voltage series feed back.
b) For an op-amp having a slew rate of 2V/usec. What is the maximum closed loop (5)
voltage gain that can be used when the input signal varies by 0.5V in 1015९८2

PART B
Answer any two full questions, each carries 15 marks.

4 a) How to realize Wein-Bridge oscillator using op. amp.? Derive the condition of (8)
oscillation and frequency of oscillation for the circuit.
b) Design a circuit to generate 1 KHz triangular wave with 5V peak. (7)
5 9) Illustrate the working principle of the grounded load voltage to current converter (8) and
deduce the condition for its ideal current converter.

b) Design a fullwave rectifier to rectify an ac signal of 0.2V peak-to-peak. Explain (7) its
principle of operation.

6 a) Derive the design equations for a second order Butterworth active low pass filter. (10)
b) Design a Notch filter to eliminate power supply hum (50 Hz). (5)
P.T.O.

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