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home assmt 2.pdf - KL University Vaddeswaram IV Semester...

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KL University, Vaddeswaram IV Semester 2011-2012 HOME ASSIGNMENT-II Course Code & Title : ECC206 & Analog Electronic Circuits Branch: Common for ECE & ECM Name of the Course Coordinator: Prof. Ch. Srinivasu Last Date for Submission: 09-04-2012 Max. Marks:5M 1) (a) How can you simplify and analyze the feedback amplifier? (b) Find the current gain, voltage gain, input and output impedances of the circuit given below. (c) A Class–B push–pull amplifier supplies power to a resistive load of 12 . The output transformer has a turns ratio of 4:1 and efficiency 78.5%. Find (i) Maximum power dissipated per each transistor(ii) Maximum i b and i c 2) (a) Write a brief note on the concept of feedback. (b) Comment on the features of negative feedback. (c) Show that the gain bandwidth product remains constant with and without feedback. 3) (a) Derive the efficiency of Class–B push pull amplifier.

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