Utilization of Digital Potentiometers in ARC Filter Re-tuning

conference paper

English

In spite of the current dominance of digital technology, analog filters have retained their importance for applications such as data preprocessing in electronic systems. Within the field, various methods of connecting universal and easily retunable ARC filters are used to provide the best attainable form of the parameters required for signal processing circuits; the group of these parameters includes, for example, the separation of effective signals from noise. The aim of this work is to explore and verify different utilization possibilities related to modern digital potentiometers that could enable us to realize a comparatively simple connection of the tunable block of an active filter. Such a filter is applicable within a broad frequency range and can be used universally in the circuits of analog data preprocessing systems. Even though these circuits were originally designed for application in acoustic devices, they appear to be a promising solution for the realization of tuning in universal retunable filters. At present, the circuits are also commonly available in the form of integrated circuits and produced in manifold versions, which facilitates the performance of simultaneous tuning of multiple elements; this type of tuning is often necessary for us to carry out successful tuning of universal filters. General application of the circuits in universal tunable filters could produce substantial simplification of the process of realizing the final connection of filters.

Filter retuning, filter, digital potentiometers

SZABÓ, Z.; SEDLÁČEK, J.

2012

19. 8. 2012

Moscow

978-1-934142-22-6

PIERS Moscow proceedings

184

188

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