
Accession Number : AD0697189
Title : DIFFERENTIAL MODE ANALYSIS AND SYNTHESIS OF SEQUENTIAL SWITCHING NETWORKS.
Descriptive Note : Technical rept.,
Corporate Author : TEXAS UNIV AUSTIN ELECTRONICS RESEARCH CENTER
Personal Author(s) : Smith,John R. , Jr. ; Roth,Charles H. , Jr
Report Date : 28 MAR 1969
Pagination or Media Count : 115
Abstract : Standard methods for classification, analysis, and synthesis of sequential switching networks are inadequate for many networks which have edgesensitive flipflops as memory. A differential mode (DM) sequential machine is introduced as a model for such networks. Any network which can be modeled by a fundamental mode a synchronous (FMA) sequential machine can also be modeled by a DM machine, but the DM machine often requires fewer internal states. A DM machine can always be converted to a FMA machine, but usually the FMA model requires additional internal states. A general model for edgesensitive flipflops is defined from which an inhibitedtoggle (IT) flipflop is derived. The IT flipflop, a generalpurpose edgesensitive flipflop, has properties which result in logic savings for some network realizations. Edgesensitive flipflops are represented by two methods: (1) FMA flow table models are developed for the IT and other wellknown types of flipflops. These models show that edgesensitive flipflops generally have hidden internal states. (2) The terminal behavior of the flipflops is described by means of difference operators. Several methods of analysis for DM networks are given. A general method for synthesis of sequential switching networks using IT flipflops is presented. The network is first represented by a DM table and flipflop input equations are derived from this table. (Author)
Descriptors : (*COMPUTER LOGIC, *SWITCHING CIRCUITS), LOGIC CIRCUITS, RELAXATION OSCILLATORS, SYNTHESIS, CLASSIFICATION
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE