Title: OP-AMPS AND APPLICATIONS
Credits: 3
Catalog Description: Op-Amp fundamentals; linear Op-Amp circuits: DC sources, current to
voltage converters, voltage to current converters, current amplifiers, difference amplifiers, instrumentation amplifiers, transducer bridge amplifiers. Active filters; practical Op-Amp limitations; stability and frequency compensation.
Coordinator: Yasemin P. Kahya, Professor of Electrical Engineering
Goals: This course aims to expose the students to the general analog principles and design methodologies using operational amplifiers and applications.
Learning Objectives:
At the end of this course, students will be able to:
Explain basic op-amp configurations and application of negative feedback in op-amp circuits.
Design and explain linear, frequency independent circuits with resistive feedback using op-amps.
Design first and second order active filters using KRC, multiple-feedback, state and biquad configurations.
Design high order filter approximations using cascade approach, direct approach and switched capacitors.
Explain the static op-amp limitations.
Explain the internal circuitry of the 741 op-amp design.
Explain the dynamic op-amp limitations.
Compare different frequency compensation techniques and design a compensation circuit for a given approach.
Textbook: Sergio Franco, Design with Operational Amplifiers and Analog Integrated Circuits, 3rd ed., McGraw-Hill Book Company, 2002
Reference Text: Thomas L. Floyd, David Buchla, Basic Operational Amplifies and LinearIntegrated Circuits, 2nd ed., Prentice Hall, 1999
Prerequisites by Topic:
Basic Electronics
Frequency-domain analysis techniques
Multi-stage amplifiers and their frequency response
Basic skills in PSpice
Topics:
Operational Amplifier Fundamentals ( 4 Lecture Hours )
Amplifier Fundamentals
Basic Op Amp Configurations
Ideal Op Amp Circuit Analysis
Negative Feedback
Feedback Circuit Examples
Nonideal Closed Loop Characteristics
Powering the Op Amp
Linear Op Amp Circuits ( 5 Lecture Hours )
a. Current to Voltage Converters
b. Voltage to Current Converters ( Floating Load and Grounded Load )
c. Current Amplifiers
d. Difference Amplifiers
e. Instrumentation Amplifiers and Applications
f. Transducer Bridge Amplifiers
Active Filters I ( 6 Lecture Hours )
a. Transfer Functions
b. First-Order Active Filters
c. Standard Second-Order Responses
d. Second-Order Low Pass Filters
e. Second-Order High Pass Filters
f. Second-Order Band Pass Filters
g. Second-Order Notch Filters
h. State Variable and Biquad Filters
Active Filters II ( 8 Lecture Hours )
a. Higher-Order Filters
b. Cascade Design
c. Generalized Impedance Converters
d. RLC Ladder Simulation Design
e. Switched-Capacitors
f. Switched-Capacitors Filters
g. Universal SC Filters
Static Op Amp Limitations and Study of 741 Op Amp Circuit ( 6 Lecture Hours )
Input Bias and Offset Current
Input Offset Voltage
Offset Error Compensation
Input and Output Impedances
Study of 741 Op Amp Circuit
Operating Limits
Dynamic Op Amp Limitations ( 4 Lecture Hours )
a. Frequency Response
b. Compensated and Uncompensated Op Amps
c. Slew Rate Limiting and its Causes
Stability and Frequency Compensation Techniques ( 6 Lecture Hours )
a. Stability
b. Phase Margin
c. Frequency Compensation Techniques
d. Advanced Frequency Compensation Techniques
Course Structure: The class meets for three lectures a week, each consisting of 50-minute sessions. 3-4 sets of homework problems are assigned per semester. There are two in-class mid-term exam and a final exam. There are two laboratory assignments consisting of circuit design and implementation.
Computer Resources: Students are encouraged to use PSpice to solve their homework problems.
Laboratory Resources: Two hardware projects are carried out in the electronics laboratory.
Grading:
1. Two Midterms: ( 25% X 2 =%50 )
2. Final: ( 35 % )
3. Homework Assignments : ( 5% )
4. Laboratory Projects ( 10% )
Outcome Coverage:
(a) Apply math, science and engineering knowledge. This course is about general analog circuit principles and applications using op-amps to realize analog circuits. Different tools from mathematics (differential equations, complex variables) in frequency domain analysis as well as from sciences (physics) in measurement circuits and engineering (electronics) in circuit analysis and design are heavily drawn upon during lectures, homework sets, exams and laboratory assignments.
(c) Design a system, component or process to meet desired needs. Designing analog circuits for different applications account for more than half of the course time. The design approach is further reinforced in laboratory assignments which involve designing instrumentation amplifier circuits for various measurement tasks and designing different types of filters using two different approaches.
(g) Ability to communicate effectively. Students are required to write a laboratory report on their design assignments and part of the grade is based on the writing style, technical content and presentation quality, both written and oral.
(k) Use of modern engineering tools. Students use PSpice for their homework assignments.
Prepared By: Yasemin P. Kahya