Fall 2009 ElEn 256 Analog and Digital Signal Processing

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Fall 2009 ElEn 256 Analog and Digital Signal Processing Professor: Gary Schwartz Prerequisite: ElEn 146 Office: C219 Co-requisite: none Office Ph: (250) 762-5445 ext 4376 Lecture: 3 hrs/week Email:

5 hrs/week Description: Advanced applications of operational amplifiers and special integrated circuits are covered with an emphasis on high performance analog signal processing leading to data

1 Fall 2009 ElEn 256 Analog and Digital Signal Processing Professor: Gary Schwartz Prerequisite: ElEn 146 Office: C219 Co-requisite: none Office Ph: (250) ext 4376 Lecture: 3 hrs/week gschwartz@okanagan.bc.ca Lab: 2.5 hrs/week Description: Advanced applications of operational amplifiers and special integrated circuits are covered with an emphasis on high performance analog signal processing leading to data acquisition and digital signal processing by computer. General Objectives: After completion of this course the student will be able to: 1. Recognize modern analog microelectronic circuits such as operational and differential amplifiers and special function circuits and discuss their fundamental operation as well as major specifications and limitations. 2. Use manufacturer's catalogues efficiently to obtain detailed specifications on relevant devices. 3. Measure the ac and dc characteristics of typical analog devices. 4. Recall and use simplified models and relationships to analyze functional analog circuits. 5. Test and troubleshoot complex analog circuits such as instrumentation amplifiers, waveform generators, active filters, timers and various signal conditioning circuits used in instrumentation and control. 6. Design analog circuits and verify their operation by means of the SPICE simulation program. 7. Design data acquisition systems. 8. Apply the discrete and fast Fourier transforms and state their limitations. 9. Design analog and digital filters and state their advantages and disadvantages Major Topics: 1. Properties of four classes of negative feedback 2. Review of Op Amps and applications 3. Op Amp DC Performance: Bias Currents, Offset voltage, Drift 4. Op Amp AC Performance: Bandwidth, Slew Rate, Noise, Stability 5. Specialized Op Amps: Single Supply, Transconductance (OTA), Current Feedback 6. Data Acquisition Systems: Hardware and Software 7. Instrumentation Amplifiers 8. Filters : Active, Switched capacitor 9. D/A Converters 10. A/D Converters 11. The Discrete Fourier Transform 12. Digital Filtering 1

2 Materials: 1. Textbook: Op Amps for Everyone, Texas Instruments, 464 page pdf file 2. Lab Manual: Bookstore Marks Distribution: Assignments 10% Lab Projects 30% Term Tests (2) 20% Final Exam 40% Okanagan College Standardized Grading System: A A (A Grades = First Class) A B B (B Grades = Second Class) B C C (C Grades = Pass) C D (D = Marginal Pass) 0 49 F (F = Fail) Your instructor may require you to use only a CASIO FX991 MS basic scientific calculator during exams (including term tests, quizzes ). One will be loaned to you for the exam. You may wish to purchase one of your own in order to become familiar with its operation but the department s calculator will be used during exams. This policy has been adopted to make exams fair for all students. In addition, no other devices are allowed during exams such as MP3 players, cell phones or PDA s. 2

3 Detailed Objectives and Activities 1. Properties of four classes of negative feedback a) Draw the 3 element block diagram for a negative feedback (NFB) amplifier. b) Derive the transfer function for the 3 element NFB amplifier c) State the effect non-infinite open loop gain has on closed loop gain. d) Identify the four different types of negative feedback used with amplifiers. e) State the amplifier type, gain stabilized, feedback factor, gain value, and limits of input and output impedance. f) State applications for each NFB type. Lab Projects: Voltage Series, Voltage Shunt Feedback Current Series, Current Shunt Feedback PSpice Quick Reference Manual PSpice Users Guide 2. Review of Op Amps and applications a) State 5 properties of an ideal op amp. b) Compare the specs for a typical op amp to the ideal specs. c) Derive the transfer functions for the following op amp circuits: i) Inverting amplifier ii) Non inverting amplifier iii) Inverting Summer iv) Difference amplifier v) Integrator vi) Differentiator Difference Amps, Integrators, Differentiators Sine Wave Generation Techniques AN-263 Op Amp Circuit Collection AN-31 An Application Guide For Op Amps AN-20 A Collection of Op Amp Applications AN-106 Analog Devices 3. Op Amp DC Performance a) Calculate the effect input offset voltage and current has on the output of an op amp. b) Compensate for input offset voltage and current. c) Compare drift specifications for offset currents and voltages. Practical Op Amp Properties 4. Op Amp AC Performance a) Define gain bandwidth product. b) Calculate bandwidth for closed loop gain amplifiers. 3

4 c) Calculate the maximum signal frequency that can be amplified without distortion at full power based on the amplifier s slew rate (ie the full power bw). d) State the factors that contribute to noise at the output of an amplifier and what can be done to minimize the noise contribution. e) State why frequency compensation may be required to provide amplifier stability. f) Calculate gain and phase margins. Practical Op Amp Properties (cont d) 5. Specialized OP AMPs a) Correctly bias and apply the following amplifiers: Single Supply Op Amp Circuits i) Single Supply eg TLV2372 ii) Transconductance (OTA) eg LM3080 iii) Current Feedback eg LM6181 Single Supply Op Amp design Techniques, Texas Instruments SLOA030a 6. Data Acquisition Systems: Hardware and Software a) State the functions of a DAQ card. b) Control a DAQ card using LabVIEW. LabVIEW, DAQ Introduction. LabVIEW User Manual LabVIEW Measurements Manual Analog Devices On Line Guides: 7. Instrumentation Amplifiers a) Analyze the operation and properties of the classical 3 op amp instrumentation amplifier. b) Compare specs for typical instrumentation amps to regular op amps. Strain Gauges and Instrumentation Amplifiers Error Budget Analysis AN-539 Designers Guide to Instrumentation Amplifiers 4

5 8. Filters a) Design high order Low pass and High pass filters using op amps. b) Apply switched capacitor filters and state their advantages and disadvantages. Active Filters A Filter Primer Filter Design Program from Microchip: Filterlab (zip file) Active, Passive, and Switched Capacitive Filters AN D/A converters a) State how R/2R and binary weighted resistive ladder D/A converters operate. b) State the advantages and properties of IC D/A converters 10. A/D converters a) State the theory of operation and properties of Flash, Successive Approximation and Dual Slope Integrating A/D converters. Demo: Dual Slope A/D Conversion in a DMM A/D Converter Types 11. The Discrete Fourier Transform a) Analyze the Continuous Fourier Transform (CFT) as template matching. b) Apply the Discrete Fourier Transform DFT) to sampled data. c) Develop the Fast Fourier Transform (FFT) from the CFT. FFT in Excel and LabVIEW Tek FFT Manual 12. Digital Filtering filters. a) Understand that multiplication in one domain is equivalent to convolution in the other domain. b) State examples of convolution in both domains. c) Design and apply Finite Impulse Response (FIR) and Infinite Impulse Response (IIR) Digital Filtering in Excel and LabVIEW Digital Filter Design Website 5

ELEN 140 ELECTRICAL CIRCUITS II Winter 2013

ELEN 140 ELECTRICAL CIRCUITS II Winter 2013 Professor: Stephen O Loughlin Prerequisite: ELEN 130 Office: C234B Co-requisite: none Office Ph: (250) 762-5445 ext 4376 Lecture: 3.0 hrs/week Email: soloughlin@okanagan.bc.ca