Method and apparatus for filtering a signal using a window value

Details Method and apparatus for filtering a signal using a window value Method and apparatus for filtering a signal using a window value

1998-02-20

2000-06-27

Mai, Tan V.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

708207, 708671, G06F 1710, G06F 700, G06F 750

Patent

active

060818204

ABSTRACT:
An apparatus and method for filtering and stabilizing a signal by using a window value is provided. The signal is sampled and each sample of the signal is input to the method or apparatus and compared to the previous output. If the difference between the input sample and the previous output is less than the window value, then the previous output is provided as the next output. However, if the difference between the reference sample and the input sample is greater than the window value, then the input sample is provided as the next output. Thus, the method and apparatus provide a constant output until the difference between the input sample and that output is greater than the window value, at which time the input sample is provided as the new output. In a preferred application, the invention can be used as a digital filter and can be embodied in the form of software, such as, for example, a C program.

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ProSeries II Rapid Acquisition Controller hand-held acquisition meter having a filter routine in the Digital Signal Processing (DSP) portion of the meter. The meter was sold by Pro-Measure Corp. around Nov. of 1995. (See attached Declaration of Paul L. Holowko).

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