GB841619A - Improvements in magnetic core shift registers - Google Patents
Improvements in magnetic core shift registersInfo
- Publication number
- GB841619A GB841619A GB2466256A GB2466256A GB841619A GB 841619 A GB841619 A GB 841619A GB 2466256 A GB2466256 A GB 2466256A GB 2466256 A GB2466256 A GB 2466256A GB 841619 A GB841619 A GB 841619A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cores
- core
- state
- current
- zero
- 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
Abstract
841,619. Circuits employing bi-stable magnetic elements. INTERNATIONAL BUSINESS MACHINES CORPORATION. Aug. 13, 1956 [Aug. 16, 1955], No. 24662/56. Class 40 (9). [Also in Group XIX] Each storage core S of a shift register is coupled by a loop 10, 12, 13, to two auxiliary cores T which provide transformer coupling with the preceding and following stages. In the register of Fig. 1 pulse generators A, B, C, and D produce pulses in the sequence shown in Fig. 2. It is assumed that all cores except S1 are in a zero remanence state, S1 being in a one state, and that current entering a core winding at its dotted end tends to shift the core to a zero state. From time t1 current IA shifts core S1 from one to zero and current induced in winding 10 shifts core T2 to a one state. Current induced in winding 13 of core T2 tends to switch cores S2 and T3 to one states but the coercive force of T3 is not overcome and only S2 switches to a one state. After time t2 current IC flows to reset core T2 to zero and currents are induced in the windings 12 and 13 which do not affect the state of cores T1 and T3 but tend to switch cores S1 and S2 from their respective zero and one states. As the current IA continues throughout the duration of the IC current, core S1 is not switched and as the rate at which T2 is restored is kept low the coercive force of core S2 is not overcome so that S2 is not switched either. By time t3, therefore, the one state of S1 has been transferred to S2. The subsequent current pulses IB and ID transfer the one state of S2 to S3 and core T3 is set back to zero by time t6. Cores S must be of rectangular hysteresis material but cores T need not be so but if they are the reset windings 14 connected to sources C and D may be connected in a single series circuit. In place of being pulsed the cores T may be reset by a continuous D.C. bias. To increase the coercive force presented by the cores S so as to increase the rate at which the T cores may be reset, a bias may be applied to the S cores. If the IA and IB pulses are applied as shown in Fig. 6 only one winding is needed on each S core. Specifications 777,519 and 828,708 are referred to.
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 |
|---|---|
| GB841619A true GB841619A (en) | 1960-07-20 |
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 After (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
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 GB GB3642359A patent/GB914348A/en not_active Expired
- 1959-10-27 DE DEJ17152A patent/DE1155169B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR1172057A (en) | 1959-02-05 |
| FR1194463A (en) | 1959-11-10 |
| DE1166256B (en) | 1964-03-26 |
| GB914348A (en) | 1963-01-02 |
| GB881378A (en) | 1961-11-01 |
| FR1172001A (en) | 1959-02-04 |
| DE1160891B (en) | 1964-01-09 |
| GB843496A (en) | 1960-08-04 |
| NL209697A (en) | |
| DE1155169B (en) | 1963-10-03 |
| DE1161311B (en) | 1964-01-16 |
| NL109283C (en) | |
| DE1142452B (en) | 1963-01-17 |
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