GB701038A - Non-linear transformers - Google Patents
Non-linear transformersInfo
- Publication number
- GB701038A GB701038A GB16068/50A GB1606850A GB701038A GB 701038 A GB701038 A GB 701038A GB 16068/50 A GB16068/50 A GB 16068/50A GB 1606850 A GB1606850 A GB 1606850A GB 701038 A GB701038 A GB 701038A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- coil
- pulses
- winding
- windings
- 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
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
- G09G1/06—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
- G09G1/08—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system
- G09G1/12—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system the deflection signals being produced by essentially analogue means
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/06—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element
- G11C11/06007—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element using a single aperture or single magnetic closed circuit
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F9/00—Magnetic amplifiers
-
- 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
- H03K17/81—Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/45—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of non-linear magnetic or dielectric devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/45—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of non-linear magnetic or dielectric devices
- H03K3/51—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of non-linear magnetic or dielectric devices the devices being multi-aperture magnetic cores, e.g. transfluxors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/042—Special circuits, e.g. comparators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
- H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1009—Calibration
Abstract
701,038. Digital electrical calculating apparatus. NATIONAL RESEARCH DEVELOPMENT CORPORATION. June 13, 1951 [June 27, 1950], No. 16068/50. Class 106 (1). [Also in Groups XXXV, XXXVIII and XXXIX] A saturable reactor comprises a number of coils embracing different numbers of laminations, forming pairs of magnetic circuits, each pair having a limb of reduced cross-section. Two sets of E-shaped laminations 1, 2, Fig. 1a, are interleaved, the set 2 being provided with notches 4 to make the magnetic circuit more easily saturable. The magnetic circuits are shown at 6-10, Fig. 2b, and the coils A, B, G, H embrace one or more of the laminations. The simple device of Fig. 4, in which a saw-toothed current is supplied to winding W1 and a steady current to winding W2 produces pulses in winding W3, the shape and duration of which vary with the circuit constants. Typical input current, flux and output voltages are shown in Fig. 5 (d), (e), (f), the negative output pulses being eliminated by the use of a rectifier. To reduce the tendency of the notch 17 in Fig. 4 to act as an air-gap, a modified notch and winding, Fig. 6, may be used. Complex wave-forms such as Vx, Vy, Fig. 7 (a) may be synthesized by a saturable reactor of the type shown in Fig. 2 (b), the circuit elements being shown schematically in Fig. 8. The wave forms are analysed into pulses as shown in Figs. 7 (b), (c), the separate pulses being produced between terminals Vx, Vy and earth. A polarizing current Ip is applied to windings 27- 33 corresponding to the B windings of Fig. 2b and a sawtooth current is applied to coil 26 of the type G. The output coils 34, 40 are of B type and produce the required positive and nega- - tive pulses in response to the saturation of the appropriate magnetic circuits by the alternating current in coil 26. The wave form, Vx, Vy shown in Fig. 7 are used for tracing the number 2 on an oscilloscope screen. For tracing numerals 1, 2 or 3 as desired, control current normally applied to terminals Ic1, Ic2 and Ic3, Fig. 9, is cut off from the appropriate terminal. A single control current Ic, Fig. 10, cancels the effect of one of an additional set of polarizing windings 47-49 to trace a number on an oscilloscope. By enlarging the apparatus to trace any one of the arabic numbers and providing several control windings such as 46, the device can be made to add numbers and trace the answer. By passing a control current Ic, Fig. 11 (c) through coils having appropriate numbers of turns and a saw-tooth drive current id through a coil 26, a waveform Vo, Fig. 11 (a), can be obtained from coil 50 in which the positive and negative half cycles are generated by the left and right-hand magnetic circuits. The magnitude of each pulse is determined by the cross-section of each lamination and the time position of each pulse by the control current Ic. Coils 51-54, 59 and 55- 58, Fig. 12, are driven respectively by currents I sin wt and I cos wt. Output coil 60 produces positive pulses at 72‹, 144‹, 216‹, 288‹ and coil 62 a negative pulse at O in each cycle. Selector switch.-A polarizing current is applied to winding 66, Fig. 13, and its effect is opposed by control current Ic applied to winding 65. As the current Ic is increased the magnetic field due to winding 66 is progressively cancelled and replaced by that in the winding 65 so that the input winding 64 which may be modulated by speech is coupled in turn to each of the ten output windings L0-L9. Binary encoding.-A control current Ic varying incrementally and applied to winding 78, Fig. 16, produces positive or negative pulses in outputs 1, 2, 3 according to the value of the control current, the outputs being arranged on a binary basis. Thus no current produces negative pulses at all outputs, a current of 10 ma produces a + ve pulse at output 1 and negative pulses at 2 and 3, while a current of 70 ma produces + ve pulses at all outputs. Adjustment of control current.-A "click plate" device, Fig. 17, may be used to adjust the control current automatically to the correct value; feed back being used to provide stability. A. common polarizing current Ipp is applied to progressive windings 81, 83 in the click plate and switch respectively. The click-plate also has input and output windings 84, 85 of H-type, the output being rectified, amplified and fed to control windings 80, 82. By injecting suitable pulses into the winding 82 the control current and hence switch output can be changed from one of the stable positions shown by the intersections of curves A and B to another in either direction and by any number of steps at one time. Fig. 18 shows a store for a single hinary digit. -A positive or negative pulse applied to coil 90 enters one or zero. A positive reading pulse applied subsequently to coil 92 induces the entered pulse to be repeated across coil 91, A store for a 4, digit binary number is shown in Fig. 20, the number being entered by the application of positive and/or negative pulses to coil 96 at. the same time as a staircase wave form is applied to coil 98 whereby switch 93 enters the number into windings 99-102. The number is read out over coil 107 digit-by-digit when four standard pulses are fed to coil 108 at the same time as a stair-case wave-form is applied to coil 110.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB16068/50A GB701038A (en) | 1950-06-27 | 1950-06-27 | Non-linear transformers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB16068/50A GB701038A (en) | 1950-06-27 | 1950-06-27 | Non-linear transformers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB701038A true GB701038A (en) | 1953-12-16 |
Family
ID=10070585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16068/50A Expired GB701038A (en) | 1950-06-27 | 1950-06-27 | Non-linear transformers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB701038A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3065912A (en) * | 1956-01-14 | 1962-11-27 | Emi Ltd | Interpolating devices |
-
1950
- 1950-06-27 GB GB16068/50A patent/GB701038A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3065912A (en) * | 1956-01-14 | 1962-11-27 | Emi Ltd | Interpolating devices |
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