GB2019621A - Improvements in or relating to binary adder circuits - Google Patents
Improvements in or relating to binary adder circuitsInfo
- Publication number
- GB2019621A GB2019621A GB7908825A GB7908825A GB2019621A GB 2019621 A GB2019621 A GB 2019621A GB 7908825 A GB7908825 A GB 7908825A GB 7908825 A GB7908825 A GB 7908825A GB 2019621 A GB2019621 A GB 2019621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- input
- inputs
- binary adder
- relating
- adder circuits
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/50—Adding; Subtracting
- G06F7/501—Half or full adders, i.e. basic adder cells for one denomination
- G06F7/502—Half adders; Full adders consisting of two cascaded half adders
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2207/00—Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F2207/38—Indexing scheme relating to groups G06F7/38 - G06F7/575
- G06F2207/3804—Details
- G06F2207/386—Special constructional features
- G06F2207/3868—Bypass control, i.e. possibility to transfer an operand unchanged to the output
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computing Systems (AREA)
- Mathematical Optimization (AREA)
- General Engineering & Computer Science (AREA)
- Image Processing (AREA)
Abstract
A binary adder circuit which, in response to a mode selection signal, is forced to operate as if two of its inputs were equal, irrespective of the actual value of those inputs. In this condition, the circuit acts effectively as a connector, coupling its input C direct to the sum output and the OR of its inputs A, B to the carry output. The invention is useful in a circuit arrangement for performing adding and shifting operations in which with X = 1 and B = 0 for all stages, input A of stage i becomes input (i+1) and hence the sum output of the latter stage. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7908825A GB2019621B (en) | 1978-04-25 | 1979-03-13 | Binary adder circuits |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1618178 | 1978-04-25 | ||
GB7908825A GB2019621B (en) | 1978-04-25 | 1979-03-13 | Binary adder circuits |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2019621A true GB2019621A (en) | 1979-10-31 |
GB2019621B GB2019621B (en) | 1982-02-24 |
Family
ID=26251877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7908825A Expired GB2019621B (en) | 1978-04-25 | 1979-03-13 | Binary adder circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2019621B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4718034A (en) * | 1984-11-08 | 1988-01-05 | Data General Corporation | Carry-save propagate adder |
-
1979
- 1979-03-13 GB GB7908825A patent/GB2019621B/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4718034A (en) * | 1984-11-08 | 1988-01-05 | Data General Corporation | Carry-save propagate adder |
GB2200230A (en) * | 1984-11-08 | 1988-07-27 | Data General Corp | Carry-save propagate adder |
GB2166894B (en) * | 1984-11-08 | 1989-08-02 | Data General Corp | Carry-save propagate adder |
GB2200230B (en) * | 1984-11-08 | 1989-08-02 | Data General Corp | Carry-save propagate adder |
Also Published As
Publication number | Publication date |
---|---|
GB2019621B (en) | 1982-02-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940313 |