288 pages | 168 B/W Illus.
Using an accessible yet rigorous approach, Active Filters: Theory and Design highlights the essential role of filters, especially analog active filters, in applications for seismology, brainwave research, speech and hearing studies, and other medical electronics. The book demonstrates how to design filters capable of meeting a given set of specifications.
Recognizing that circuit simulation by computer has become an indispensable verification tool both in analysis and in design, the author emphasizes the use of MicroCap for rapid test of the filter. He uses three basic filter types throughout the book: Butterworth, Chenyshev, and Bessel. These three types of filters are implemented with the Sallen-Key, infinite gain multiple feedback, state-variable, and biquad circuits that yield low-pass, high-pass, band-pass, and band-reject circuits. The book illustrates many examples of low-pass, high-pass, band-pass, and notch active filters in complete detail, including frequency normalizing and denormalizing techniques.
Design equations in each chapter provide students with a thorough grounding in how to implement designs. This detailed theoretical treatment gives you the tools to teach your students how to master filter design and analysis.
Filters and Signals
Basic Filter Types
The Mathematics of Elementary Filters
Why Active Filters?
The Voltage-Controlled Voltage Source (VCVS)
Frequency Response Normalization
First-Order Low-Pass Filter
First-Order High-Pass Filter
Wide-Band Band-Reject Filters
Comments on VCVS Filters
Comments on MFB Filters
FILTERS WITH THREE OP-AMPS
State Variable Filter
Some General Properties
Magnitude and Phase Sensitivities
FILTERS WITH GIC
Generalized Impedance Converters
Low-Pass Filter Design
High-Pass Filter Design
Narrow-Band Band-Pass Filter Design
Narrow-Band Band-Reject Filter Design
Single OTA LP Filters with Three Passive Components
Second-Order Low-Pass Filter
Second-Order LP Filter with Four Passive Components
Second-Order Band-Pass Filter
Some Non-Ideal Feature of the OTA
SWITCHED CAPACITOR FILTERS
The Switched Capacitor Resistors
The Switched Capacitor Integrator
Practical Limitations of SC Filters
Appendix A: Node Voltage Network Analysis
Appendix B: Filter Design Nomograph
Appendix C: First- and Second-Order Factors of Denominator Polynomial
Appendix D: Formulas of Normalized Filters
Appendix E: Element Values for Low-Pass LC Filters
Appendix F: Coefficients of Denominator Polynomial