GB881378A - Improvements in logical switching devices - Google Patents
Improvements in logical switching devicesInfo
- Publication number
- GB881378A GB881378A GB1791959A GB1791959A GB881378A GB 881378 A GB881378 A GB 881378A GB 1791959 A GB1791959 A GB 1791959A GB 1791959 A GB1791959 A GB 1791959A GB 881378 A GB881378 A GB 881378A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- state
- cores
- winding
- pulse
- 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.)
- Expired
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
- G06F7/383—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using magnetic or similar elements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
- G11C19/04—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using cores with one aperture or magnetic loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/16—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using saturable magnetic devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Mathematical Physics (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Computer Hardware Design (AREA)
- Coils Or Transformers For Communication (AREA)
- Dc Digital Transmission (AREA)
- Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
- Control Of Stepping Motors (AREA)
- Electronic Switches (AREA)
- Discharge By Other Means (AREA)
Abstract
881,378. Circuits employing bi-stable magnetic elements. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 26, 1959 [Aug. 27, 1958], No. 17919/59. Class 40 (9). In a logical switching circuit using magnetic cores with appreciable remanence and low coercivity and comprising a biased input core C1, a storage core S and an output core C2 all initially in the " 0 " remanent state, an input signal " 1 " applied to core C1 reverses the remanent state of cores C1 and C2 to state " 1," while automatic restoration of core C1 to the " 0 " state by the bias, following termination of the input signal, causes core S to change to state " 1," the cores S and C2 being subsequently restored to state " 0 " by a read-out clock pulse IB. As shown, the core C1 is biased by a current Id.c. in a winding 38 and has an output winding 12 connected in a series loop A with a control winding 10 and input winding 14 on cores S and C2 respectively. When the core C1 is driven to state " 1 " by the input signal, a pulse is induced in the loop which reverses C2 but is without effect on core S since it acts in the existing " 0 " sense. A further pulse of opposite polarity appears in the loop when C1 is automatically restored to state " 0," this pulse reversing core S to state " 1 " but having no restoring effect on core C2 as the control winding 10 has a larger number of turns than the input winding 14. Due to the presence of a diode D in the circuit of output winding 24 of C2, an effective output pulse is obtained only when the cores S and C2 are restored to state " 0 " by a pulse IB in windings 40, 42. This output pulse is applied over a loop B to set cores C3, C4 and C5 to state " 1 " and these cores are subsequently restored to state " 0 " by a clock pulse IA. In a modification, Fig. 3 (not shown), an inhibiting winding is included on core C2. The core C1 may have any number of input windings such as 16, 18 and 20 as shown, and the bias may be adjusted so as to provide OR or AND operation. Alternatively two input windings wound in opposite senses may be used, this arrangement with a bias value such that a single input may reverse the core state providing the logical operation NOT IF THEN.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US528594A US2907987A (en) | 1955-08-16 | 1955-08-16 | Magnetic core transfer circuit |
| US548581A US2919354A (en) | 1955-11-23 | 1955-11-23 | Magnetic core logical circuit |
| US625826A US2904779A (en) | 1956-12-03 | 1956-12-03 | Magnetic core transfer circuit |
| US757482A US3163771A (en) | 1958-08-27 | 1958-08-27 | Logical transfer circuit |
| US769838A US3077585A (en) | 1958-10-27 | 1958-10-27 | Shift register |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB881378A true GB881378A (en) | 1961-11-01 |
Family
ID=27541848
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2466256A Expired GB841619A (en) | 1955-08-16 | 1956-08-13 | Improvements in magnetic core shift registers |
| GB3550156A Expired GB843496A (en) | 1955-08-16 | 1956-11-20 | Improvements in magnetic core switching networks |
| GB1791959A Expired GB881378A (en) | 1955-08-16 | 1959-05-26 | Improvements in logical switching devices |
| GB3642359A Expired GB914348A (en) | 1955-08-16 | 1959-10-27 | Shift register |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2466256A Expired GB841619A (en) | 1955-08-16 | 1956-08-13 | Improvements in magnetic core shift registers |
| GB3550156A Expired GB843496A (en) | 1955-08-16 | 1956-11-20 | Improvements in magnetic core switching networks |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3642359A Expired GB914348A (en) | 1955-08-16 | 1959-10-27 | Shift register |
Country Status (4)
| Country | Link |
|---|---|
| DE (5) | DE1142452B (en) |
| FR (3) | FR1172001A (en) |
| GB (4) | GB841619A (en) |
| NL (2) | NL209697A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB706736A (en) * | 1952-01-03 | 1954-04-07 | British Tabulating Mach Co Ltd | Improvements in or relating to electrical storage devices |
| US2781503A (en) * | 1953-04-29 | 1957-02-12 | American Mach & Foundry | Magnetic memory circuits employing biased magnetic binary cores |
| US2784390A (en) * | 1953-11-27 | 1957-03-05 | Rca Corp | Static magnetic memory |
| AT196644B (en) * | 1955-08-16 | 1958-03-25 | Ibm | Circuit for forwarding information stored in a magnetic core |
-
0
- NL NL109283D patent/NL109283C/xx active
- NL NL209697D patent/NL209697A/xx unknown
-
1956
- 1956-07-27 FR FR1172001D patent/FR1172001A/en not_active Expired
- 1956-08-13 GB GB2466256A patent/GB841619A/en not_active Expired
- 1956-08-16 DE DEI12068A patent/DE1142452B/en active Pending
- 1956-11-20 GB GB3550156A patent/GB843496A/en not_active Expired
- 1956-11-21 DE DEI12484A patent/DE1161311B/en active Pending
- 1956-11-21 FR FR1172057D patent/FR1172057A/en not_active Expired
-
1957
- 1957-11-30 DE DEI14048A patent/DE1166256B/en active Pending
- 1957-12-02 FR FR1194463D patent/FR1194463A/en not_active Expired
-
1959
- 1959-05-26 GB GB1791959A patent/GB881378A/en not_active Expired
- 1959-05-26 DE DEI16487A patent/DE1160891B/en active Pending
- 1959-10-27 DE DEJ17152A patent/DE1155169B/en active Pending
- 1959-10-27 GB GB3642359A patent/GB914348A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1160891B (en) | 1964-01-09 |
| NL209697A (en) | |
| DE1161311B (en) | 1964-01-16 |
| DE1142452B (en) | 1963-01-17 |
| DE1155169B (en) | 1963-10-03 |
| FR1172001A (en) | 1959-02-04 |
| GB843496A (en) | 1960-08-04 |
| DE1166256B (en) | 1964-03-26 |
| NL109283C (en) | |
| FR1172057A (en) | 1959-02-05 |
| FR1194463A (en) | 1959-11-10 |
| GB914348A (en) | 1963-01-02 |
| GB841619A (en) | 1960-07-20 |
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