An EL-PC device to implement flow-table logic for variable pattern recognition

A SEQUENTIAL CIRCUIT IS Oh’E in which the present output is a function not only of the present inputs, but also the past history of these inputs. D. A. Huffman’ has suggested that a chart, called a flow table, be used to record the sequence of these past input conditions and to define the operation of the desired circuitry. A set of standard manipulations involving this chart has been developed as a means of deriving the proper Boolean expressions. A method which bypasses all these manipulations has been suggested by P. R. Low and G. A. Muley2