Examination Paper: Analogue Electronics 1 (ELTR 6002) - Cork Institute of Technology, Exams of Digital & Analog Electronics

Download Examination Paper: Analogue Electronics 1 (ELTR 6002) - Cork Institute of Technology and more Exams Digital & Analog Electronics in PDF only on Docsity! 1 ELTR 6002 CORK INSTITUTE OF TECHNOLOGY INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ Semester 1 Examinations 2009/10 Module Title: ANALOGUE ELECTRONICS 1 Module Code: ELTR6002 School: ELECTRICAL & ELECTRONIC ENGINEERING Programme Titles: Bachelor of Engineering in Electronic Engineering, Year 1 Bachelor of Engineering in Electronic Systems Engineering, Year 1 Programme Codes: EELXE_7_Y1 EELES_8_Y1 External Examiner(s): Dr. A. Donnellan Dr. P. O’Sullivan Internal Examiner: Mr M. O’Gorman Instructions: Answer 5 of the 7 Questions. All Questions Carry Equal Marks. Duration: 2 Hours Sitting: Winter 2009 Requirements for this examination: N/A Note to Candidates: Please check the Programme Title and the Module Title to ensure that you are attempting the correct examination paper. If in doubt please contact an Invigilator. 2 ELTR 6002 Q.1 (a) Briefly explain the differences between continuous and discrete information sources. [10 Marks] (b) Describe how analogue and digital signals might be used to represent this information. [10 Marks] Q. 2 (a) Define the decibel. [8 Marks] (b) Express the following power ratios as gains or losses in decibels; [12 Marks] (i) 1, (ii) 2, (iii) 200 (iv) 0.5. Q. 3 The input signal voltage level to an amplifier is +24dB relative to 1µV, and the amplifier has a decibel voltage gain of 30dB. If the input and ouput resistances are equal, calculate the input and output voltages. [20 Marks] Q.4 A sinusoidal voltage waveform is given by the equation v = 311 sin(314t). Determine; (a) the peak value, [4 Marks] (b) the angular frequency, [4 Marks] (c) the cyclic frequency, [4 Marks] (d) the periodic time, [4 Marks] (e) the instantaneous voltage 12 ms into the cycle. [4 Marks] Q. 5 (a) What is meant by donor doping and acceptor doping? [12 Marks] (b) Explain how the conductivity of a semiconductor material is increased by either of the above processes. [8 Marks]