GB853580A - Improvements in or relating to devices for indicating variations in coded information - Google Patents

Improvements in or relating to devices for indicating variations in coded information

Info

Publication number
GB853580A
GB853580A GB19810/57A GB1981057A GB853580A GB 853580 A GB853580 A GB 853580A GB 19810/57 A GB19810/57 A GB 19810/57A GB 1981057 A GB1981057 A GB 1981057A GB 853580 A GB853580 A GB 853580A
Authority
GB
United Kingdom
Prior art keywords
windings
cores
code
series
rectifiers
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
Application number
GB19810/57A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB853580A publication Critical patent/GB853580A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C19/00Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/04Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using cores with one aperture or magnetic loop
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/02Comparing digital values

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Rectifiers (AREA)

Abstract

853,580. Circuits employing bi-stable magnetic elements. PHILIPS ELECTRICAL INDUSTRIES Ltd. June 24, 1957 [June 27, 1956], No. 19810/57. Class 40 (9). Coded information in the form of unidirectional pulses applied selectively and coincidently to a plurality of leads determines the individual directions of magnetization of a group of cores formed of rectangular hysteresis material, and any change in the code is indicated by an output pulse which is generated as a result of magnetization reversal of one or more of the cores. As shown in Fig. 1, the coded information is applied over leads 1-4 to input windings A1-A4 on cores K1-K4, and at the same time pulses from a source 6 are applied to windings B1-B4. The A and B windings act in opposition with the A windings exercizing an over-riding control, with the result that repeated applications of the same code maintain those cores associated with pulsed leads in one magnetic state, while the remaining cores are magnetized in the opposite sense. If the code changes however, the pattern of magnetization alter, and output pulses are induced in those windings N1-N4, P1-P4 which are associated with cores whose magnetic state is reversed. These windings are wound in opposition on each core and are connected to rectifiers G11-G15 Since the windings N1-N4 are connected in series and windings P1-P4 in parallel, a positive output pulse appears at terminal U whenever the coded information changes, irrespective of the combination of core reversals which takes place. Spurious outputs produced by flux excursions between remanence and saturation in the same magnetizing sense, when the code is repeated in unchanged form, are suppressed by a D.C. source V which biases the rectifiers. The separate pulse source 6 may be dispensed with by utilizing the incoming code pulses, Fig. 2, the necessary constant current through the B windings being obtained by the use of a non- linear resistor R or an output-limited triode. In a further arrangement, Fig. 3, the opposed N and P windings are omitted, and their functions are respectively performed by the series and parallel connected B and A windings which are shunted by rectifiers G11-G15. This arrangement utilizes the high impedance of a core, during the transition period when it changes state, to direct a pulse derived from the inputs or source 6 through the shunt circuits and a common resistor R20 to the output U. The number of rectifiers required may be reduced by arranging the cores so as to correspond to a matrix, Fig. 4, with cores along one diagonal omitted. Three inputs 1-3 are provided in this embodiment, each being applied to a row and to a column of cores over series-connected A and B windings. As before, the A and B windings act in opposition and a core is acted upon by an input pulse passing through its B winding only if no input is effective in its A winding. Opposed N and P windings are also provided, the correspondingly lettered windings on each side of the diagonal being connected in series with a rectifier G21-G24. As before, a change of code is indicated by an output pulse at U. In a modification, Fig. 5 (not shown), one rectifier may be omitted by connecting all the P windings in series. A further arrangement, Fig. 6, utilizes a single winding P<SP>1</SP> on each core in place of separate P and N windings, the P<SP>1</SP> windings on each side of the diagonal forming a closed series circuit, in conjunction with resistors R41-R44, which is associated with rectifiers G41-G44 so as to provide an output at U irrespective of the direction of the induced current.
GB19810/57A 1956-06-27 1957-06-24 Improvements in or relating to devices for indicating variations in coded information Expired GB853580A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL356941X 1956-06-27

Publications (1)

Publication Number Publication Date
GB853580A true GB853580A (en) 1960-11-09

Family

ID=19785254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19810/57A Expired GB853580A (en) 1956-06-27 1957-06-24 Improvements in or relating to devices for indicating variations in coded information

Country Status (5)

Country Link
CH (1) CH356941A (en)
DE (1) DE1076406B (en)
FR (1) FR1177954A (en)
GB (1) GB853580A (en)
NL (2) NL91302C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150406B (en) * 1961-02-10 1963-06-20 Siemens Ag Electronic circuit arrangement for generating telegraph characters with m steps with a step distributor for determining the individual telegraphing steps

Also Published As

Publication number Publication date
NL208441A (en)
NL91302C (en)
CH356941A (en) 1961-09-15
FR1177954A (en) 1959-04-30
DE1076406B (en) 1960-02-25

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