  This paper addresses a new approach to find a spectrum of information
measures for the process of digital circuit synthesis. We consider the problem
from the information engine point of view. The circuit synthesis as a whole and
different steps of the design process (an example of decision diagram is given)
are presented via such measurements as entropy, logical work and information
vitality. We also introduce new information measures to provide better
estimates of synthesis criteria. We show that the basic properties of
information engine, such as the conservation law of information flow and the
equilibrium law of information can be formulated.
