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- W103412369 abstract "It is a truth universally acknowledged, that if you are designing an active crossover, you will need active devices. In this day and age that almost always means opamps. Active crossovers can be built with discrete transistor circuitry if this is desirable for performance benefits or marketing reasons. This is relatively straightforward for Sallen & Key filters that require only a unity-gain buffer or voltage-follower, which can be implemented as some form of emitter-follower. It is a bit more complex for MFB filters and some equaliser circuits, which require a high-open-loop-gain inverting amplifier, and more complex again for configurations such as state-variable filters, which require multiple differential amplifiers. (The first active crossover I designed for production was in fact a discrete-transistor system, solely on the grounds of performance, for the affordable opamps of the time were really not very good.) However, even if the crossover architecture is confined to Sallen & Key filters, matching the distortion performance of the newer opamps is going to be no easy matter. The noise performance of discrete circuitry should be slightly better, but in a typical application the differences will be marginal. In this chapter the most important audio opamps are closely examined for their noise, distortion, and load-driving performance. The relatively unknown problem of common-mode distortion is fully explained and techniques given for its reduction." @default.
- W103412369 created "2016-06-24" @default.
- W103412369 creator A5053805696 @default.
- W103412369 date "2011-01-01" @default.
- W103412369 modified "2023-09-24" @default.
- W103412369 title "Opamps for Active Crossovers" @default.
- W103412369 cites W642739503 @default.
- W103412369 doi "https://doi.org/10.1016/b978-0-240-81738-5.00013-6" @default.
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