DES-2015-16_QP_02122015.docx

# DES-2015-16_QP_02122015.docx - K L UNIVERSITY Department of...

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K L UNIVERSITY Department of ECE Course Title: DESIGN OF ELECTRONIC SYSTEMS Course Code: 13EC201 Branches: ECE/ECM/EEE Academic Year: 2015-2016 Name of the Course Coordinator: N SURESH Course Outcom e (C.O) Course Outcome Indicator (C.O.I) Q. N o Blooms Taxonomy Level (B.T.L) Marks 1 1 1 What is a transducer? Understand 1 2 Write any sensor in Humanoid. Understand 1 3 Write any Actuator in a Music system. Understand 1 4 Mention different types of distortions. Understand 1 5 Mention the applications of Light Dimmers. Understand 1 6 Mention the applications of LEDS. Understand 1 2 1 Distinguish between Analog and Digital Signals. Remember 2 2 Distinguish between linear and nonlinear amplifiers. Remember 2 3 Distinguish between noise and distortion. Remember 2 4 Classify amplifiers based on input and output signals. Remember 2 5 Compare ideal and real diodes. Remember 2 6 Sketch cross-over and harmonic distortions Remember 2 3 1 The input and output voltages of an amplifier are v i =5 sin (1000 t +0°) mV and v o =1000 sin (1000t+ 180°) mV. Find the magnitude and phase of the voltage gain of the amplifier Apply 4 2 An n-channel MOSFET has K p =25 mA/V 2 and V t = 2V. If the gate–source voltage is v GS =4V, find the small-signal trans conductance g m of the MOSFET. Transconductane g m = di D dv GS Apply 4 P a g e 1 | 13

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3 The Pulse response of a circuit is shown in the below fig. Find the off time (t off ) and Delay time (t d ). Apply 4 4 The base current of a bipolar transistor is i B =2(1+sin 2000 t ) mA and the current gain of the transistor is β F = 100. What are I B , I C , and i c ? Apply 4 5 For a bipolar transistor, the collector–emitter voltages are V CE = 6 V and v ce =-100 sin (2000 π t ) mV, and the base–emitter voltages are V BE = 0.7 V and v be = 1 sin (2000 π t ) mV. a . What are the expressions for v CE and v BE ? b . Find the small-signal voltage gain A v. Apply 4 6 For an FET, the drain–source voltages are V DS =6V and v ds =-50 sin (1000 π t) mV, and the gate–source voltages are V GS =3 V and v gs =2 sin (1000 π t) mV. a. What are the expressions for v DS and v GS ? b. Find the small-signal voltage gain Av. Apply 4 4 1 Design a circuit to measure a DC voltage in the range from 0 to 400 V. For a full-scale deflection, the indicating meter draws 100µA at a voltage of 1 V (DC) across it. The input current from the source should be less than 1 mA. Design 5 P a g e 2 | 13
2 Design a circuit to measure a DC voltage in the range from 0 to 600V. For a full-scale deflection, the indicating meter draws 200µA at a voltage of 2 V (DC) across it. The input current from the source should be less than 2 mA. Design 5 3 Design a circuit to measure a DC voltage in the range from 0 to 200V. For a full-scale deflection, the indicating meter draws 300µA at a voltage of 2 V (DC) across it. The input current from the source should be less than 3 mA.

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