Maple

Syntfil

Intended Audience:

• Researchers and electrical engineers need to design filters.
• Educators teaching filter design courses.
• Students who need a tool to solve filter design problems.

Product Description:

Syntfil is a package for Maple™, which helps with the design of analog electrical filters, containing all the procedures required for complex filter design. This package allows the users to calculate filter approximations, and synthesize LC ladder filters and active RC (ARC) filters for all the basic filter types: lowpass, highpass, bandpass and band-rejection. In addition, this package includes functions to perform analysis of the designed filter structures.

Features list:

• Set of functions for solving approximation tasks: normalization of required filter specification to normalized lowpass (NLP) filter specification, computation of the Butterworth, Chebyshev, Cauer (types A, B and C) and the Inverse Chebyshev (types A and B) approximations, i.e. computation of gain and characteristic function.
• Set of functions for LC filter realization from gain and characteristic functions: computation of chain matrix for a chosen filter termination, synthesis of LC ladder filter from chain matrix, transformation of LC ladder structure of normalized lowpass filter (NLP) to lowpass, highpass, bandpass or band-rejection.
• Set of functions for cascade design of active RC (ARC) filters: NLP pole-zero frequency transformation, biquadratic functions forming (pole-zero pairing), determination of biquad cascading order, calculation of gain distribution and realization of particular biquads
• Analysis of resulting filter structures including of Q-factors of inductors for LC ladders and DC open-loop gain and unity-gain frequency of operational amplifiers for ARC filters.

Technical Requirements

• Maple 8 or higher

Developer Information

• Authors and Library Developers: Jan Bicak and Jiri Hospodka
  The Czech Technical University of Prague
  Faculty of Electrical Engineering
  bicak@feld.cvut.cz, hospodka@feld.cvut.cz
  
  Web site: http://syntfil.feld.cvut.cz/
  
  Jan Bicak and Jiri Hospodka work as assistant professors in the Department of Circuit Theory, Faculty of Electrical Engineering, Czech Technical University of Prague. They are dealing with design of time continuous and switched analog circuits. They have been using Maple since 1995 for their research and teaching activity.

Technical Support

Terms: Standard

• For a period of one year after purchase, all service packs and updates will be made available free of charge to the customer. Send requests to bicak@feld.cvut.cz or hospodka@feld.cvut.cz.
• For a period of four months after purchase, all feature upgrades will be made available free of charge to the customer.