By Topic

Analysis of cyclic combinational circuits

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Malik, S. ; Dept. of Electr. Eng., Princeton Univ., NJ, USA

A logic circuit is said to be combinational if the function it computes depends only on the inputs applied to the circuit, and is sequential if it depends on some past history in addition to the current inputs. Circuits that have an underlying topology that is acyclic are combinational, since feedback is a necessary condition for them to be sequential. However, it is not a sufficient condition since there exist combinational logic circuits that are cyclic. These occur often in bus structures in data paths. Traditional formal techniques in logic synthesis, logic analysis, and timing analysis of combinational circuits have restricted themselves to acyclic combinational circuits, since they have been unable to handle the analysis of circuits with cycles. Thus, in practice, these circuits are handled using clumsy work-arounds, which is obviously undesirable. This paper presents a formal analysis of these circuits and presents techniques for the logical and timing analysis of such circuits. These techniques are practically feasible on reasonably large circuits encountered in practice

Published in:

Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:13 ,  Issue: 7 )