Analog Filter Design

Focuses on the design on classical analog filters and analog oscillators. The course covers Butterworth, Chebyshev, Cauer, and Bessel filter types, frequency transformations, and detailed circuit implementations. Circuits discussed include passive networks, op-amp filters, state-variable types, impedance converters, switched capacitors, and operational transconductance amplifiers. The second section of the course covers analog oscillator analysis and design, including feedback and nonlinear-circuit analysis, amplitude stabilization, voltage control, and a variety of applications.

1. Introduction to Analog Filter Design
   • Applications
   • Course overview
   • Classical design approach
   • Transfer functions and the s-plane
2. Approximation Functions and Frequency Transformations
   • Butterworth, Chebyshev, Cauer, and Bessel
   • Low-pass, high-pass, band-pass, and notch filters
   • Transfer-function transformations
   • Circuit transformations
3. Op-amp Circuits and State-Variable Filters
   • Op-amp history
   • Op-amp building blocks
   • State-variable filters
   • Cascade considerations
4. Passive Network Synthesis
   • Positive-real and lossless functions
   • Foster's and Cauer's realization
   • Lossless twoports
   • Terminated LC ladders
5. Simulated Passives and Sensitivity
   • Direct element replacement
   • Impedance scaling and replacement
   • Functional simulation
   • Sensitivity
6. Switched-Capacitor and OTA-C Filters
   • Switched-capacitor circuits
   • Sampled-data systems
   • OTA-C filters
   • MOSFET-C filters

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Lecturer

Kent H. Lundberg is an educator, consultant, and historian. He is president of Keeling Flight Hardware, Ltd., which provides design, research, and educational consulting services in the fields of aerospace, electronics, and control systems for companies, universities, and government organizations.

Since 2008, Dr. Lundberg has been a Visiting Professor at Olin College of Engineering, where he teaches courses in controls, circuit design, and instrumentation. From 2002 to 2005, he was a Lecturer with the Department of Electrical Engineering and Computer Science at the Massachusetts Institute of Technology. His research and teaching interests include the application of classical control theory to problems in analog circuit design, and the development of educational toys (lecture demos, take-home laboratory kits, and tutorial computer applications) for feedback systems and control engineering.

Dr. Lundberg has been the Associate Editor for History of IEEE Control Systems Magazine since 2004. He attended M.I.T. earning a Bachelor's degree in physics in 1992, and a Ph.D. in electrical engineering in 2002. He owns 21 Tektronix oscilloscopes, and he obsessive-compulsively collects analog synthesizers, technology artifacts, and classic textbooks on radar, nuclear energy, analog computing, and control.