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#Filter designer tool update
#Filter designer tool manual

This approach can be used to analyze the impact of component tolerances.

#Filter designer tool update

Once we update these values, we can see that the filter still meets our requirements and if we want, we could check the attenuation graph with these new values.

These changes in values will impact the performance of the filter, but all we need to do is to click on the values and change them manually. We will also have to use an 0.5Ω resistor. 3.8♟ and 15.4♟ are not standard values of capacitance, so let’s assume we use standard 3.3♟ and a 15♟ instead. The filter that the tool designs includes some non-standard components. The graph also shows the resonance at about 40kHz: obviously if there was any noise at this frequency, it would be slightly increased on the output. The attenuation can also be analyzed using the graph, which shows we are well below the target attenuation at 50kHz. In our example the filter meets all three of these criteria. The tool checks to see whether the filter meets the attenuation goal that was set, if it is optimally damped and ensures it will also be stable. The tool also gives us the opportunity to analyze the performance of the filter, so we’ll click “CHECK FILTER” to get a graph showing the attenuation by frequency. We’re presented with the following solution: This isn’t particularly demanding, so let’s just put the values in and click the “DEFAULT FILTER” button, which will create the filter for us. Let’s assume we are designing a DC-DC input filter for a regulated power component and have done some testing that shows noise at 50kHz needs to be attenuated by 20dB.

A selector to identify whether the converter is regulated or unregulated.

The frequency that needs to be attenuated.

When you open the Filter Design Tool, you are presented with a form with four inputs: All you need to do is select the frequency you need to suppress, and the amount of attenuation you require, and the tool does the rest. The Filter Design Tool makes the design of filters to eliminate EMI easy. Designing filters, however, requires complex and time-consuming calculations, unless you use the Power Bench Filter Design Tool.

#Filter designer tool manual

Refer to the specific hardware or target manual for information on these options.Meeting EMI standards is a one of the biggest challenges for power system designers, with passive filters being a key weapon to attenuate unwanted frequencies in DC-DC converters. If you have installed external hardware or targets that interact with FDATool, you may see additional options in FDATool. Saving and Opening Filter Design Sessionsīelow is a brief introduction to the FDATool that will give you a better understanding of how it can be used.Setting the Filter Design Specifications.

Opening the Filter Design and Analysis Tool.

This chapter contains the following sections, which walk you through a typical filter design session using the FDATool: You can use FDATool as a convenient alternative to the command line filter design functions.

FVTool, which can be launched from FDATool, provides a separate window for analyzing filters. FDATool also provides tools for analyzing filters, such as magnitude and phase response plots and pole-zero plots. FDATool enables you to quickly design digital FIR or IIR filters by setting filter performance specifications, by importing filters from your MATLAB workspace, or by directly specifying filter coefficients. The Filter Design and Analysis Tool (FDATool) is a powerful user interface for designing and analyzing filters. Note The Filter Design and Analysis Tool (FDATool) requires resolution greater than 640 x 480. Filter Design and Analysis Tool (Signal Processing Toolbox) Signal Processing Toolbox