US4034356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reconfigurable logic array
Assignee: International Business Machines Corp
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Filing: 1975-12-03
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Granted: 1977-07-05
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Expires: 1995-12-03
Abstract
Abstract This specification describes a set of arrays for performing logic function in various subsets of the original set. The array structure is characterized by a plurality of arrays joined together with a bidirectional bussing system. This bussing system comprises addressing lines of the arrays joined together by switching circuitry used to regroup the set into subsets as necessary to perform the logic functions.
Inventors
- 👤 Frank E. Howley
- 👤 John W. Jones
- 👤 Joseph C. Logue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:52
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/317; G01R31/3181; G01R31/3185; G01R31/318516; H; H03; H03K; H03K19/00; H03K19/02; H03K19/173; H03K19/177; H03K19/17704; H03K19/17708; H03K19/17716; H03K19/1772
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
137 words
A reconfigurable logic array comprising: a plurality of programmable logic arrays made up of latches and sets of AND and OR arrays having common addressing lines that extend through all sets of arrays with inputs supplied to the AND arrays on lines transverse to said common addressing lines and the latches coupled to the outputs of the OR arrays on lines transverse to said common addressing lines; gating means along the common address lines between the sets for controlling the passage of signals between sets; latching means on said addressing lines between the sets for storing bits of data transmitted along said addressing line; and clocking means for opening and closing said gating means at different time periods whereby the sets of AND and OR arrays can be connected and disconnected as necessary to perform logic functions.
Claim 2
Dependent Claim
137 words
A reconfigurable logic array comprising: a plurality of programmable logic arrays made up of latches and sets of AND and OR arrays having common addressing lines that extend through all sets of arrays with inputs supplied to the AND arrays on lines transverse to said common addressing lines and the latches coupled to the outputs of the OR arrays on lines transverse to said common addressing lines; gating means along the common address lines between the sets for controlling the passage of signals between sets; latching means on said addressing lines between the sets for storing bits of data transmitted along said addressing line; and clocking means for opening and closing said gating means at different time periods whereby the sets of AND and OR arrays can be connected and disconnected as necessary to perform logic functions.
Claim 3
Dependent Claim
62 words
A reconfigurable array according to claim 1 including means for supplying input signals to AND arrays during a first one of said time periods; means including said latching means for storing the results of said supplies of signals in said latching means; and means including said latches for storing the results in the latches during a second one of said time periods.
References Cited (Backward Citations)
US2855540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |