Product category:
Design and Development Software
News Release from: Anadigm | Subject: FilterDesigner
Edited by the Electronicstalk Editorial
Team on 08 August 2001
Software puts standard filters on
analogue arrays
Anadigm has added filter synthesis to its field-programmable analogue array (FPAA) configuration software.
Anadigm has added filter synthesis to its field-programmable analogue array (FPAA) configuration software The tool provides an extremely versatile means of specifying high-order classical filters, and combining them with additional signal conditioning circuitry to implement single-chip analogue solutions
This article was originally published on Electronicstalk on 4 Jan 2001 at 8.00am (UK)
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Dubbed FilterDesigner, the new tool comes free with the latest version of Anadigm's configuration software for FPAAs.
Users can choose from highpass, lowpass, bandpass and bandstop filter types, and within the space of a few minutes create and output the required coefficients in an ideal form for implementation using combinations of the bilinear and biquad filter elements provided in Anadigm's drag-and-drop library of ready-to-use IPmodules.
With 20 analogue blocks available, each of which is capable of implementing a single filter stage, FPAA users can construct highly sophisticated single-chip analogue solutions - something which is currently only achievable by ASIC technologies.
In its default mode, FilterDesigner v1.0 offers Bode plot views of filter response for highpass, lowpass, bandpass and bandstop filters.
Linear amplitude, and linear phase plots are also available.
Butterworth, Chebyshev, inverse Chebyshev or elliptic approximations may be employed to create the desired response.
All that users need to do is specify the characteristics of the filter effect they seek, in terms of high-level parameters such as corner frequencies and passband gain.
The tool automatically constructs the required circuit, and decomposes it into the filter stages and settings required for implementation using the general-purpose array structure of an FPAA.
The software will create filters of any complexity, but alerts users if the filter design is beyond the capacity of the first generation of FPAAs.
Depending on the bandwidth, this upper limit can be as high as a 20th-order filter in a single chip.
FPAAs can be concatenated if higher-order filters are required.
FilterDesigner is free, and may be downloaded from the Anadigm website.
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