Patent US3278732A successfully refreshed from Google Patents.
US3278732A
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High speed multiplier circuit
Assignee: International Business Machines Corp
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Filing: 1963-10-29
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Granted: 1966-10-11
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Expires: 1983-10-29
Abstract
No abstract record available.
Inventors
- 👤 Munro K Haynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:13
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/52; G06F7/523; G06F7/527; G06F7/5272; G06F7/5275
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
160 words
A CIRCUIT FOR MULTIPLYING A N-BIT MULTIPLICAND BY AN M-BIT MULTIPLIER COMPRISING: AN ARRAY OF ADDERS WITH R ADDERS PER MULTIPLICAND BIT, EACH OF SAID ADDERS HAVING A CARRY-DELAY TIME OF C, A SUM-DELAY TIME OF S AND A RECYCLE TIME FOR ITS LOGICAL ELEMENTS OF R, WHERE S AND R ARE INTEGRAL MULTIPLES OF C AND AT LEAST ONE OF THEM IS GREATER THAN C; MEANS FOR APPLYING EACH BIT OF THE MULTIPLICAND TO THE ADDERS FOR THAT BIT UNDER CONTROL OF THE BITS OF THE MULTIPLIER; MEANS FOR APPLYING THE CARRY OUTPUT FROM EACH ADDER TO THE NEXT ADDER TO BE UTILIZED FOR THE SAME MULTIPLICAND BIT; MEANS FOR APPLYING THE SUM OUTPUT FROM EACH ADDER TO THE ADDER S MULTIPLICAND BIT POSITIONS AND S ADDER POSITIONS ADVANCED FROM THE ADDER GENERATING THE SUM OUTPUT; WHEREBY S PARTIAL PRODUCTS ARE FORMED; AND AN ARRAY OF R(S-1) CONSOLIDATION ADDERS FOR CONSOLIDATING SAID S PARTIAL PRODUCTS INTO THE FINAL PRODUCT.
References Cited (Backward Citations)
US2685407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |