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Patent US4433331A successfully refreshed from Google Patents.
US4433331A
Expired / Lapsed
US
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Programmable logic array interconnection matrix
Assignee: AT&T Inc
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Filing: 1981-12-14
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Granted: 1984-02-21
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Expires: 2001-12-14
Abstract
Abstract An interconnection matrix is disclosed for connecting inputs and outputs of logic circuit of a programmable logic array (PLA). The interconnection matrix consists of row conductors each connected to an input of a logic circuit and segments of column conductors each connected to an output of a logic circuit. By limiting the interconnection capability of each column conductor several column conductors each electrically isolated from each other can share the same column of the interconnection matrix. The resulting PLA can perform various logic functions using an interconnection matrix which does not grow geometrically with an increase in the number of logic circuits.
Inventors
- 👤 Paul W. Kollaritsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:48
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/173; H03K19/177; H03K19/17704; H03K19/17708; H03K19/17712; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
76 words
An electrical interconnection matrix comprising a plurality of substantially orthogonally disposed and electrically isolated rows and columns of electrical conductors including programmable cross points at intersections between the row and column conductors for enabling electrical connection therebetween characterized in that said column conductors are arranged in groups, each of said column conductors comprising two or more electrically isolated colinear segments, the segments of different groups having programmable cross points to a unique group of row conductors.
Claim 2
Dependent Claim
76 words
An electrical interconnection matrix comprising a plurality of substantially orthogonally disposed and electrically isolated rows and columns of electrical conductors including programmable cross points at intersections between the row and column conductors for enabling electrical connection therebetween characterized in that said column conductors are arranged in groups, each of said column conductors comprising two or more electrically isolated colinear segments, the segments of different groups having programmable cross points to a unique group of row conductors.
Claim 3
Dependent Claim
14 words
The invention of claim 1 wherein some of said groups include one column conductor.
Claim 4
Dependent Claim
32 words
The invention of claim 1 wherein some segments which have intersection with the same group of row conductors have a unique group of programmable cross points to said group of row conductors.
Claim 5
Dependent Claim
18 words
The invention of claim 1 wherein some segments have intersections with row conductors without a cross point therebetween.
Claim 6
Dependent Claim
17 words
The invention of claim 1 wherein each segment has intersection with the same number of row conductors.
Claim 7
Dependent Claim
15 words
The invention of claim 5 wherein each segment has the same number of cross points.
Claim 8
Dependent Claim
19 words
The invention of claim 6 wherein each segment has a cross point at each intersection with a row conductor.
Claim 9
Dependent Claim
121 words
A logic performing arrangement comprising a plurality of logic circuits and programmable cross points, each logic circuit including an input and an output where the output of each logic circuit is selectively connectable to an input of other logic circuits of the plurality of logic circuits through separate programmable cross points characterized in that said logic circuits are arranged in multiple sets where each set includes one or more logic circuits with the output of each logic circuit of a set having identical selective connectability to the inputs of other logic circuits of a predetermined number of sets and wherein the outputs of logic circuits of different sets have selective connectability to different predetermined number of sets of said multiple sets.
Claim 10
Dependent Claim
121 words
A logic performing arrangement comprising a plurality of logic circuits and programmable cross points, each logic circuit including an input and an output where the output of each logic circuit is selectively connectable to an input of other logic circuits of the plurality of logic circuits through separate programmable cross points characterized in that said logic circuits are arranged in multiple sets where each set includes one or more logic circuits with the output of each logic circuit of a set having identical selective connectability to the inputs of other logic circuits of a predetermined number of sets and wherein the outputs of logic circuits of different sets have selective connectability to different predetermined number of sets of said multiple sets.
Claim 11
Dependent Claim
21 words
The invention of claim 8 where the output of each logic circuit is selectively connectable to one of its own inputs.
Claim 12
Dependent Claim
39 words
The invention of claim 8 where the output of a first logic circuit is selectively connectable to an input of a second logic circuit having an output which is selectively connectable to an input of said first logic circuit.
Claim 13
Dependent Claim
29 words
The invention of claim 8 where the output of a logic circuit of each set is selectively connectable to the input of a logic circuit of an adjacent set.
Claim 14
Dependent Claim
29 words
The logic performing arrangement of claim 8 further comprising an input variable terminal selectively connectable through separate programmable cross points to logic circuits of a predetermined number of sets.
Claim 15
Dependent Claim
14 words
The invention of claim 8 where said logic circuits are multiple input logic gates.
Claim 16
Dependent Claim
15 words
The invention of claim 1 or 8 where said programmable cross points are electrically reprogrammable.
Claim 17
Independent Claim
84 words
A method of constructing an electrical interconnection matrix by orthogonally arranging a plurality of electrically isolated rows and columns of electrical conductors including programmable cross points at intersections between the row and column conductors, said method further characterized by the steps of grouping one or more column conductors together in groups, and segmenting the column conductors of each group into two or more electrically isolated colinear segments with the segments of different groups having programmable cross points to a unique group of row conductors.
Claim 18
Independent Claim
84 words
A method of constructing an electrical interconnection matrix by orthogonally arranging a plurality of electrically isolated rows and columns of electrical conductors including programmable cross points at intersections between the row and column conductors, said method further characterized by the steps of grouping one or more column conductors together in groups, and segmenting the column conductors of each group into two or more electrically isolated colinear segments with the segments of different groups having programmable cross points to a unique group of row conductors.
Claim 19
Independent Claim
110 words
A method of constructing a logic performing arrangement comprising a plurality of logic circuits and programmable cross points by interconnecting the inputs and outputs of the logic circuits using programmable cross points arranged in a rectangular matrix having electrically isolated row and column conductors for respectively connecting to each row and column of the cross points of the rectangular matrix, said method further characterized by the steps of grouping one or more column conductors together in groups, and segmenting the column conductors of each group into two or more electrically isolated colinear segments with the segments of different groups having programmable cross points to a unique group of row conductors.
Claim 20
Independent Claim
110 words
A method of constructing a logic performing arrangement comprising a plurality of logic circuits and programmable cross points by interconnecting the inputs and outputs of the logic circuits using programmable cross points arranged in a rectangular matrix having electrically isolated row and column conductors for respectively connecting to each row and column of the cross points of the rectangular matrix, said method further characterized by the steps of grouping one or more column conductors together in groups, and segmenting the column conductors of each group into two or more electrically isolated colinear segments with the segments of different groups having programmable cross points to a unique group of row conductors.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |