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6. Applications and results
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...
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Analysis software
A number of analysis software packages are available, based on the principles of nodal analysis, to which refinements have been added to reduce calculation times and introduce the imperfections of active elements. Comparative analyses are available at
Examples of catalogued tours
Several manufacturers offer switched-capacitor biquadratic cells in the form of cataloged circuits. The best-known are the MF10 and LMF100 (National Semiconductor), containing two second-order biquadratic cells in a 20-pin package (DIP package) ...
Manufacturers
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Linear Technology
Maxim
National Semiconductor
Texas Instruments
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