S.£., ~eAq') It Dec.PR 126 S.XpC. Con. 5358-08. E-I EC- to-en L U ~J r {@ I/2-/ ~g RC-61.64. (REVISED COURSE) (3 Hours) , [ Total Marks: .100 N.S.: (1) Question NO.1 is compulsory. (2) Solve any four questions from remaining. (3) Assume suitable additional data wherever nec~ssary. 1. Design the two stage R-C coupled CS amplifier to meet the following specifications. 20 IAvl > 100. FL < 20 Hz Va = 4 V. IOSQ= 1.2 mA Ass~me gmo = 5000 ~H Vp= 4V. Assume suitable VDD lOSS = 7 mA rd = 50 K O. r 2. (a) Design a large signal transformer coupled 'class A power amplifier to 10 provide 10W output to .the 4 Q load. h (b) Explain working and analyze class B power amplifier. 10 3. (a) Draw the circuit diagram using op-amps to realize Va = 6V1 + 3 V2 - 3V3' 10 Derive output expression. (b) Designop-ampbasedWein-Bridgeoscillatorwhichgenerates15KHzfrequency. 10 4. (a) Draw equivalent circuit of FET amplifier at high frequency for the given 10 amplifier and hence draw low frequency response. (b) What are the various methods to improve CMR~ of differential amplifier? 10 5. (a) Draw BiFET, BiMOS differential amplifier circuits. State application for ~ach. 10 (b) Using suitable block diagrams explain various types of negative feedback 10 ~ circuits. 6. (a) Draw the circuit diagram of a temper~ture compensated log amplifier. 10 Derive expression of putput. ',. . (b) What are advantages of crystal oscillator over other high and low frequency 10 oscillator. 7. Write a short notes :- (a) Cascode Amplifier (b) Darlington Pair Amplifier (c) Tuned Collector Oscillator (d) Design of Heat Sink. 20