Abstract
All transistor circuits are nonlinear. That is to say, portions of many of the voltage or current signals in such circuits are not only directly proportional to other signals, but are proportional to the products, squares, and cubes of other signals. A large number of circuits, however, are designed to approximate linear systems; we designate such circuits as quasilinear. Linear systems are immensely useful for signal processing and, in the context of the more general class of nonlinear systems, enjoy great simplifications in concept and in mathematical analysis. Linear system theory, with its powerful principle of superposition, offers a lucidity and intuitive power of great value to circuit and system designers. For the most part, the techniques of linear system theory are applicable to quasilinear circuits as well. For precise applications, however, the circuit designer must evaluate the limits of the linear approximation and moreover, must often devise ways to improve a circuit’s conformance to linear operation. The analytical and conceptual tools necessary for such evaluation are the topic of this chapter.
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Willingham, S.D., Martin, K. (1995). Distortion in Quasilinear Circuits. In: Integrated Video-Frequency Continuous-Time Filters. The Springer International Series in Engineering and Computer Science, vol 323. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2347-5_4
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DOI: https://doi.org/10.1007/978-1-4615-2347-5_4
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