US3275812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threshold gate adder for minimizing carry propagation
Assignee: General Electric Co
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Filing: 1963-07-29
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Granted: 1966-09-27
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence L Coates
- 👤 Ii Philip M Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:48
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F7/505; G06F7/506; G06F2207/00; G06F2207/38; G06F2207/3804; G06F2207/386; G06F2207/3876; G06F2207/48; G06F2207/4802; G06F2207/4818
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN ADDER COMPRISING A PLURALITY OF STAGES FOR GENERATING THE SUM OF TWO NUMBERS FROM THE LOWEST ORDER LEVEL DIGIT TO THE HIGHEST ORDER LEVEL DIGIT REPECTIVELY, THE ITH ONE OF SAID STAGES SUMMING A PAIR OF DIGITS X1 AND YI TO PRODUCE A SUM S1 AND INCLUDING A CARRY PRODUCING THRESHOLD MEANS RECEIVING A PLURALITY OF INPUT SIGNALS AND PRODUCING A CARRY OUTPUT SIGNAL K1, MEANS COUPLING THE OUTPUT OF SAID ITH STAGE, CARRY PRODUCING THRESHOLD MEANS TO THE INPUT OF THE (I+1)THE STAGE, SAID ITH STAGE CARRY PRODUCING THRESHOLD MEANS HAVING A THRESHOLD VALUE IN THE GAP U:L=2M:2M-1, WHEREIN U IS THE SMALLEST TOTAL VALUE OF INPUT SIGNALS FOR WHICH THE THRESHOLD IS EXCEEDED, L IS THE LARGEST TOTAL VALUE OF INPUT SIGNALS OF WHICH THE THRESHOLD IS NOT EXCEEDED, AND M IS THE ORDER OF THE ITH STAGE WITHIN A PREDETERMINED GROUPING OF SAID STAGES, SAID CARRY PRODUCING THRESHOLD MEANS IMPLEMENTING INPUTS FROM THE ITH AND LOWER ORDER STAGES ACCORDING TO THE EXPRESSION,
Claim 2
Dependent Claim
166 words
IN ADDER COMPRISING A PLURALITY OF STAGES FOR GENERATING THE SUM OF TWO NUMBERS FROM THE LOWEST ORDER LEVEL DIGIT TO THE HIGHEST ORDER LEVEL DIGIT REPECTIVELY, THE ITH ONE OF SAID STAGES SUMMING A PAIR OF DIGITS X1 AND YI TO PRODUCE A SUM S1 AND INCLUDING A CARRY PRODUCING THRESHOLD MEANS RECEIVING A PLURALITY OF INPUT SIGNALS AND PRODUCING A CARRY OUTPUT SIGNAL K1, MEANS COUPLING THE OUTPUT OF SAID ITH STAGE, CARRY PRODUCING THRESHOLD MEANS TO THE INPUT OF THE (I+1)THE STAGE, SAID ITH STAGE CARRY PRODUCING THRESHOLD MEANS HAVING A THRESHOLD VALUE IN THE GAP U:L=2M:2M-1, WHEREIN U IS THE SMALLEST TOTAL VALUE OF INPUT SIGNALS FOR WHICH THE THRESHOLD IS EXCEEDED, L IS THE LARGEST TOTAL VALUE OF INPUT SIGNALS OF WHICH THE THRESHOLD IS NOT EXCEEDED, AND M IS THE ORDER OF THE ITH STAGE WITHIN A PREDETERMINED GROUPING OF SAID STAGES, SAID CARRY PRODUCING THRESHOLD MEANS IMPLEMENTING INPUTS FROM THE ITH AND LOWER ORDER STAGES ACCORDING TO THE EXPRESSION,
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |