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US3278732A Expired / Lapsed US ⏱️ 0.0 years remaining

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
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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

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