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Lecture
Are you an EPFL student looking for a semester project?
Work with us on data science and visualisation projects, and deploy your project as an app on top of Graph Search.
This lecture covers the design and implementation of active filters, focusing on second-order filters and the realization of high-order filters. It discusses the general second-order filter function, the Sallen-Key single OPAMP second-order LP filter, and the Deliyannis BP circuit. The lecture also explores the concept of cascading filters, multiple feedback single OPAMP biquads, and the Tow-Thomas biquad. Additionally, it delves into the simulation of LC ladder filters, including direct and indirect simulation methods. The implementation of active-RC and OTA-C filters is detailed, along with LTSpice simulations and signal flow diagrams. The summary highlights the Butterworth and Chebyshev filter approximations and the design considerations for all-pole LC ladder filters.