Real Time Digital Filters: Finite Impulse‐Response Filters

Document Type

Article

Journal/Book Title

Analytical Chemistry

Publication Date

3-1-1988

Volume

60

First Page

355

Abstract

In the past, chemists were not concerned with filtering, because data were obtained using analog instrumentation with hardware analog filters. The most common implementation of a filter consisted of a network of resistors and capacitors to affect the frequencey characteristics of signal transfer. However, with the recent advent of affordable digital processor-based data acquisition systems, real-time digital filtering is becoming an ever-increasing facet of the modern analytical laboratory. Proper use of digital filters can result in data with dramatically improved signal-to-noise (S/N) ratios and in the simplification of complex information. Digital filtering is not a magical procedure for data transformation. The trick to proper implementation of the digital filter is prior knowledge of the system's signal and noise components.

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