Informatics / TAMS / Applets / Karnaugh-Veitch Diagram Applet Description This page demonstrates KV diagrams and logic minimization. It is intended for our computer science undergraduate students. For a detailed explanation of KV (Karnaugh Veitch) diagrams see any standard computer science or electrical engineering textbook. The applets supports minimization in both disjunctive (AND-OR) and conjunctive (OR-AND) forms. Minimiziation of multiple-output functions, however, is only supported in disjunctive form. In order to minimize a given logic function in a two-level and-or representation, one has to merge minterms into other terms, which cover multiple (2,4,8,16, etc) minterms each. Such terms are much cheaper in the resulting logic realization. The basic idea of a KV diagram is to represent a given boolean function in a two-dimensional function table with a special arrengement of terms. In a KV diagram, neighbored entries represent function-table entries which differ in only one variable. Therefore, drawing 'loops' around multiple minterms is equivalent to find merges of minterms. For an example, click here. The applet visualizes this process, because at each step the two-level logic realization of the function is plotted in a seperate window and updated whenever you combine terms. You can watch how the function schematic gets simpler (and the logic realization gets cheaper) while you minimze the function. Applet features Currently, the applet provides the following functionality: functions with up to 6 inputs and up to 8 outputs minimization in disjunctive (DNF, and-or) and conjunctive (KNF, or-and) forms minimization of multi-output functions (DNF only) several example functions user-defined functions student mode for visualization circuit schematics display The applet Note that the applet will not appear here, but will open two separate top-level windows.   Sorry, but your browser seems to ignore Java-applets. Enable Java in your browser preferences, and reload this page to start the KVD-applet. Documentation At the moment, we offer the following documentation and downloads for the KV diagram applet: applet usage, with some example screenshots (in German only). An older version of the tutorial, which does not match the current version of the applet. However, it is available in English, and it has a very short introduction to KV-diagrams. Full documentation about the concepts and implementation of the current KVD applet. (compressed Postscript, reverse page order, in German) download an archive (ZIP-format) with all classes and images, to use locally on your own computer. Unpack and open the file 'start.html' in a Java-enabled browser. 22.04.99 Impressum http://tams-www.informatik.uni-hamburg.de/applets/kvd/kvd.html