High-performance programmable filter modules

The Kemo 1600 Series range of filter modules has been developed for data-acquisition applications where extremely high performance has to be combined with high numbers of channels.

The Kemo 1600 Series range of filter modules has been developed for data-acquisition applications where extremely high performance has to be combined with high numbers of channels.

The new range uses advanced continuous-time filter design techniques to offer significant benefits compared with integrated-circuit filter chips designed to address the same application sector.

Unlike many IC filters, the Kemo devices exhibit low variation of DC offset with cutoff frequency and no high-frequency clock breakthrough or input aliasing.

Noise and linearity performance are also far superior, allowing the filters to be used with convertor systems of the very highest performance.

The 1600 Series modules can be supplied with a wide range of filter types and response shapes, including lowpass filters optimised for high-performance alias protecting, highpass for the elimination of low-frequency disturbances prior to A/D conversion, and special-purpose responses.

The basic module measures only 50 x 50 x 15 mm, and is digitally programmable for cutoff frequency over a 255:1 range.

Models offering cutoffs over the range 1Hz to 255kHz are available.

The 1600W modules provide an even greater cutoff span with 100 pseudologarithmic filter steps over a 1792:1 range.

This combination allows small steps at low frequency while still covering a wide frequency range.

A range of carrier cards allows the filters to be used in data-acquisition systems as part of a combined filter/amplifier unit for local amplification and the filtering of low-level noisy signals.

Back to top