Analogue System Integration. NHE 2482. Updated Sep. 2016: P. Lazaridis, P. Mather, D. Upton Where to submit assignment reports: Unilearn-Turnitin In submitting this assignment, students should be aware of the following: • Unless there are extenuating circumstances, work handed in after the hand-in date will receive a mark no greater than 40%; if handed in after the cut-off date (1 week after the hand-in date) the mark will be 0%. • Student Handbook of Regulations: Section 5 covers procedures for students wishing to claim extenuating circumstances. Sections 4 and 6 define plagiarism and the procedures and penalties for dealing with it. IMPORTANT NOTE: Tutors marking coursework will use the Turnitin plagiarism service to check for plagiarism, and will use it where possible in all cases where plagiarism is suspected. Plagiarism is just not worth it!! • You are advised to keep copies of all your assignments in case of difficulties. The signature below confirms that you have read and understood the regulations concerning handin deadlines, penalties for late submission, plagiarism and extenuating circumstances procedures and that the work submitted is your own. Student Name: Course and Year Signature: Student Number: Module Title Module Number Module Tutor Analogue System Integration NHE2482 Dr Pavlos Lazaridis Assignment Title Ass. Weighting Date Stamp: System / Circuit Design and Analysis 30% Hand-In Date Date Submitted Word CountAnalogue System Integration. NHE 2482. Updated Sep. 2016: P. Lazaridis, P. Mather, D. Upton PERFORMANCE FEEDBACK (to be completed by the Module Tutor) Criterion % Weight Grade Overall Grade ……………................. 1 25% 2 35% Tutors Signature: 3 30% ........................................................... 4 10% Date Returned: ................................. Written Feedback (Tutor inserts criteria) Criterion 1: Circuit Building Blocks explained (Differential Pair, CE amp, CC amp). Basic circuit analysis, calculations of DC voltages & currents, ac parameters: voltage gain, input-output impedance, CMRR , maximum output voltage swing. Criterion 2: Circuit analysis using NI Multisim simulations: same parameters as above. Build the circuit with discrete components and measure it with a multimeter, signal generator, and oscilloscope (construction evidence). Criterion 3: Circuit design – quantitative improvements to the basic circuit supported by NI Multisim simulation results (in dB where appropriate). Criterion 4: Presentation – Quality and clarity of the presentation – 'Engineering report' style. Further General Feedback:Analogue System Integration. NHE 2482. Updated Sep. 2016: P. Lazaridis, P. Mather, D. Upton Assignment Unit Title: Analogue System Integration. NHE2482 Assignment Title: System / Circuit Analysis and Design Weighting: 30% Tutor: Dr. P. Lazaridis (Room CE1-08) Timetable Time: Part (a). 6 hours. Semester 1 (2x3hours) Additional Time: 12 hours Resources: Manufacturer's Datasheets, Library publication material, Textbooks, Lecture notes, Internet, SPICE, NI Multisim. Learning Outcomes: (a) Understand theoretical material and techniques. (b) Be able to analyse and accurately simulate circuits and systems. (c) Be able to design, build, and make improvements to circuits. Deliverables: A formal, typed report whose sections adhere to the Objectives outlined in the assignment specification. The report should not have more than TWENTY pages of written text, (THIRTY pages maximum with Diagrams and Simulation Data). Legible copies of manufacturer's data and textbook diagrams and other relevant detailed material will be acceptable. All factual comments and copies must be REFERENCED. Marks. Objectives. Marks. 1 25% 2 30% 3 35% 4 10%Analogue System Integration. NHE 2482. Updated Sep. 2016: P. Lazaridis, P. Mather, D. Upton Assignment Specification Introduction You should complete the objectives during the semester 1, twelve-week period; you have been allocated 6 hours on your timetable to do this. This part of the assignment is based on the lecture and tutorial work you will be doing during this time. Objectives 1. Analysis. You are going to prove that you have a basic understanding of analogue ICs. Circuit diagram 1 is a very simplified version of an integrated operational amplifier (op-amp) with only 4 transistors. (The first generally recognized monolithic IC op amp was in 1963 the uA 702 using 9 transistors). Explain briefly its building blocks and their function, Perform an approximate DC analysis (assuming β >> 1, so that the base current of every transistor can be ignored) to calculate the DC collector currents and voltages in the circuit. Then calculate the quiescent power dissipation and the total voltage gain. Then, calculate the ac characteristics of the circuit, such as, total voltage gain (dB), input-output impedance, CMRR (dB-Common Mode Rejection Ratio), maximum output voltage swing. Assume a β = 400 (NPN), 300 (PNP), and Early voltage = 100 V (NPN), 75 V (PNP). Ideally, an op-amp should have a very high input impedance (MOhms), low output impedance (10-100 Ohms), very high voltage gain (> 10.000 = 80 dB), and a very high CMRR (> 80dB). Is this the case with this simple circuit? (25%). 2. Analysis - Simulation. You are going to prove your ability to accurately simulate an analogue IC. Run a simulation with NI Multisim of the above mentioned circuit (using probes) and calculate the same DC operating conditions and ac operating characteristics. Compare the results, and comment on any discrepancies found. Use images taken from NI Multsim. Construct the circuit on veroboard (soldering) with discrete components (transistors BC547, BC557), test and measure it with a multimeter (measure voltages and transistor β), signal generator and oscilloscope. Measure the frequency response and cut-off frequency. Construction evidence required. (30%). 3. Design. This is your chance to prove what a great IC designer you are ! a) Make improvements to the very simple op-amp of diagram 1 (e.g. use current mirrors, cascaded differential amplifiers, Darlington pairs, etc.) in order to upgrade its performance. Do not use resistors larger in value than 50kOhms due to area limitations and prefer to use active components (easier to realise in IC technology) over passive ones. Simulate the new circuit(s) in NI Multisim and calculate the new and improved values of voltage gain (dB), input-output impedance, CMRR (dB), etc. The design having the best characteristics and using a minimal number of resistors and transistors will be the best. b) The circuit must drive an 8 Ω loudspeaker. Make changes to the circuit so this can be accomplished. Crossover distortion (THD-Total Harmonic Distortion), thermal runaway and short circuit protection should also be taken into account within the design changes. These changes should be analysed (in detail) in terms of advantages and limitations, relative to the original circuit with the help of NI Multisim. (35%). 4. Presentation. You are going to prove that you can produce a professional 'engineering report'. The report should have three major sections; objective 1, 2 & 3. These may be split into sub-sections. Each numbered section should be legible; text and diagrams. The report should be typed, diagrams, circuits, calculations and equations must be electronically presented. It is useful to add an introduction and conclusions section. (10%).Analogue System Integration. NHE 2482. Updated Sep. 2016: P. Lazaridis, P. Mather, D. Upton . Circuit diagram 1. A very simple integrated operational amplifier - DC operation. Circuit diagram 2. A very simple integrated operational amplifier - ac operation.