GB1059312A - Improvements in or relating to pulse generating circuits - Google Patents
Improvements in or relating to pulse generating circuitsInfo
- Publication number
- GB1059312A GB1059312A GB28661/63A GB2866163A GB1059312A GB 1059312 A GB1059312 A GB 1059312A GB 28661/63 A GB28661/63 A GB 28661/63A GB 2866163 A GB2866163 A GB 2866163A GB 1059312 A GB1059312 A GB 1059312A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductor
- current
- time constant
- field
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
- H03K17/64—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors having inductive loads
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/80—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices
- H03K17/84—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices the devices being thin-film devices
Abstract
1,059,312. Circuits employing bi-stable magnetic elements. INTERNATIONAL COMPUTERS & TABULATORS Ltd. July 6, 1964 [July 19, 1963], No. 28661/63. Heading H3B. In order to compensate for changes in amplitude of a magnetic field produced by eddy currents in an electrically conductive layer 2. superimposed by a magnetic film 1, due to a current pulse train applied from a pulse generator 9 to the drive conductor 5 of the magnetic film a compensating circuit 22 comprising the parallel combination of a resistor 24 and an inductor 23 is connected in series with the pulse generator, the values of the inductor and resistor being such that the time constant of the pulse generator and compensating circuit is substantially equal to the time constant of the eddy currents. In order to store a digit of one binary significance in the element 1, a hard axis magnetic field is applied to the element 1 by energization of conductor 6 from source 7 and simultaneously a pulse is applied to conductor 5 by bottoming transistor 11. On termination of the current pulse applied to the conductor 6 the magnetization vector adopts the same direction as the easy axis field. In order to store a digit of the other binary significance transistor 17 is bottomed instead of transistor 11 so that current flows in the opposite direction through 5 with the result that when the easy and hard direction fields are terminated the magnetization vector adopts the opposite direction. If a train of pulses is applied to either transformers 15 or 19, the total effective easy axis field decreases with successive pulses due to a decrease in the eddy currents in substrate 2 field component. By including the circuit 22 having components of values to make the time constant thereof equal to the eddy current time constant, the current through the conductor 5 gradually increases and this increase tends to overcome the decrease in the eddy current field component and thereby maintain the total field constant. The circuit described may be used to drive the digit lines of a matrix. The conductors 5, 6 may be arranged at a small angle to the axes, in which case energization of conductor 6 alone sets the element in one stable state and energization of both conductors sets the element in the other stable state so that one of the transistors may be omitted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB28661/63A GB1059312A (en) | 1963-07-19 | 1963-07-19 | Improvements in or relating to pulse generating circuits |
| US382574A US3405401A (en) | 1963-07-19 | 1964-07-14 | Pulse generating compensation circuits in magnetic thin film devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB28661/63A GB1059312A (en) | 1963-07-19 | 1963-07-19 | Improvements in or relating to pulse generating circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1059312A true GB1059312A (en) | 1967-02-15 |
Family
ID=10279133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28661/63A Expired GB1059312A (en) | 1963-07-19 | 1963-07-19 | Improvements in or relating to pulse generating circuits |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3405401A (en) |
| GB (1) | GB1059312A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3258752A (en) * | 1959-06-08 | 1966-06-28 | Manufacture of storage devices | |
| NL274669A (en) * | 1961-02-13 | |||
| US3293622A (en) * | 1962-12-31 | 1966-12-20 | Ibm | Termination for combined bit and sense windings |
-
1963
- 1963-07-19 GB GB28661/63A patent/GB1059312A/en not_active Expired
-
1964
- 1964-07-14 US US382574A patent/US3405401A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3405401A (en) | 1968-10-08 |
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