Op Amps: Multi-band EQ

In this video we examine the construction of a multi-band audio equalizer. Typical examples include 10 band octave equalizers and 31 band one-third octave equalizers. There are different ways of approaching this design. In this version we use op amp gyrators in order to avoid less-than-ideal inductors. Before watching this video, it is strongly suggested that you watch the videos covering the resonant EQ circuit and simple gyrators in the Op Amps playlist. If you're not familiar with series resonant circuits, also check out the series resonance video in the AC Circuit Analysis playlist.

References: Operational Amplifiers and Linear Integrated Circuits: Theory and Application; Chapter 11, section 9.

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