Applications and results
Filtres à capacités commutées

The now classic applications of switched-capacitor filters are as follows:

• filters for telephone lines, fax machines, modems ;

• medical or acoustic instrumentation filters for frequency selection ;

• filters for very low-level detection of signals embedded in broadband noise ;

• low-selectivity noise rejection filters for general instrumentation ;

• anti-aliasing filters for analog-to-digital converters ;

• center-frequency tunable filters (ranges < 100 kHz).

In the face of the inexorable rise of digital devices, we may well wonder about the future and durability of switched-capacitor filters. Indeed, one could argue that digital filters based on DSPs (Digital Signal Processors) will face competition, particularly in the relatively low frequency ranges. But DSPs in particular...