A state-of-the-art crystal filter design package using Windows 3.0 techniques

Details A state-of-the-art crystal filter design package using Windows 3.0 techniques A state-of-the-art crystal filter design package using Windows 3.0 techniques

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.340..209f&link_type=abstract

In ESA, Frequency and Time Forum p 209-216 (SEE N93-24978 09-70)

Computer Science

Graphics

1

Computer Aided Design, Computer Graphics, Computer Programs, Crystal Filters, Design Analysis, Integrated Circuits, Optimization, Bandpass Filters, Bandstop Filters, Crystal Lattices, Fourier Transformation, Graphical User Interface, Least Squares Method, Low Pass Filters, Signal Analysis

Scientific paper

A company owned software package TeleQuartz (TQ) WINFIL for systematic design of crystal filters is reported. TQ WINFIL offers access to several levels of the filter synthesis: the pole-zero plane, the normalized low pass domain, and the synthesis of the final crystal filter circuit. At each synthesis level, an analysis module as well as an optimization module are included. This allows the user to analyze the theoretical models as well as the real crystal filter circuit including losses, component tolerances, and nonideal characteristics such as spurious responses of the crystals. The optimization modules make it possible to search iteratively for a network solution from a starting set of values in order to meet special requirements. Frequency unsymmetric responses can be computed by a frequency transformation module, which effects the bilinear transformation of all circuit components of the filter. Any parameter changes in the synthesis and any action of the optimization module not only cause changes of the desired response, they also influence the other characteristics of the filter. The Windows graphical user interface allows the simultaneous display of all interesting parameters and results during the whole cycle of synthesis, analysis, optimization, and transformation.

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