High-quality sub-function construction in the information-driven circuit synthesis with gates

The opportunities created by modern microelectronic technology cannot effectively be exploited, because of weaknesses in traditional circuit synthesis methods used in today´s CAD tools. In this paper, a new information-driven circuit synthesis method is discussed that targets combinational circuits implemented with gates. The synthesis method is based on our original information-driven approach to circuit synthesis, bottom-up general functional decomposition and theory of information relationship measures, and considerably differs from all other known methods. The discussion is focused on various sub-function construction methods used during the synthesis. The experimental results from the automatic circuit synthesis tool that implements the method show that the developed by us specific sub-function construction methods targeted to the gate-based circuits deliver much better circuits than the other methods and demonstrate that the information-driven general decomposition produces very fast and compact gate-based circuits.