On the base of the traditional approaches for designing synchronous sequential circuits,a new approach for designing asynchronous sequential logic circuit is proposed in this paper where the trigger pulses can be directly obtained from sequential waveforms in sequential circuits,and the next state Karnaugh maps can be acomplished according to the state transformations caused by clock signals.

Absolute encoder based on Karnaugh map;

Simplied one-way Karnaugh map method for optimization of logic design;

The Karnaugh map applies in the logicalfunction transformation and in the MSI logic circuit design;

Here introduce the tradition method and exactitude fast conversion method by contrast, including logic truth table, logic functional formula and Karnaugh.

The Improvement and Application of the drawing method of Karnaugh diagram;

The Maximum Formula of Logic Function and Its Simplification of Karnaugh Diagram;

This paper brieny discusses the question-how to use the pointclass diagram of multiple dimension to simplify the logistic equation, The point-classdiagram of multiple dimensions is more audio-visual vivid and simple than the wenn diagram and karnaugh diagram in the course of count and it can also express the logisticrelations of more than four dimensions.