Null convention logic system
AssigneeTheseus Research, Inc.
InventorsKarl M. Fant, Scott A. Brandt
Life of this patent
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Abstract
A logic system, which is capable of logical expression comprising processing members interconnected by transmission elements, wherein the processing member resolves at least two or more input allowed values to one result allowed value, allowed values including one or more data values and one or more non-data values, at least one non-data value being a null value, the processing member changing its result value to a data value only when all of its presented input values are valid and changing its result value to a NULL value only when all of its presented input values are NULL values.
Claims10
A logic system which is capable of logical expression, comprising processing members interconnected by transmission elements, processing members having two or more input and an output, the transmission elements transmitting allowed values from processing member outputs to processing member inputs, a processing member resolving at least two input allowed values to one result allowed value via a set of transfrom rules specifying a mapping for each combination of input allowed values to an output allowed value, allowed values including at least one data value and at least one non-data value, at least one-data value veing a NULL value, the set of transform rules further specifying that a processing member:
- (1) switches its output allowed value to a different value when all of its presented input values is a valid combination of data values, or
- (2) switches its output allowed value to a diffrent value when all of its presented input values are NULL values, but
- (3) does not switch its output allowed value to a different value when its presented input values are a mixture of NULL and data values.
Dependencies are inferred from the claim text.