GB940635A - Magnetic core memory driving system - Google Patents

Magnetic core memory driving system

Info

Publication number
GB940635A
GB940635A GB1458362A GB1458362A GB940635A GB 940635 A GB940635 A GB 940635A GB 1458362 A GB1458362 A GB 1458362A GB 1458362 A GB1458362 A GB 1458362A GB 940635 A GB940635 A GB 940635A
Authority
GB
United Kingdom
Prior art keywords
read
switching
matrix
write
current source
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
GB1458362A
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.)
ERIC THOMAS BEAVIS
Original Assignee
ERIC THOMAS BEAVIS
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
Priority claimed from US91123A external-priority patent/US3195114A/en
Application filed by ERIC THOMAS BEAVIS filed Critical ERIC THOMAS BEAVIS
Priority to GB1458362A priority Critical patent/GB940635A/en
Publication of GB940635A publication Critical patent/GB940635A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G11C11/06014—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 using one such element per bit
    • 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
    • G11C11/06014—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 using one such element per bit
    • G11C11/06021—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 using one such element per bit with destructive read-out
    • G11C11/06028—Matrixes
    • G11C11/06042—"word"-organised, e.g. 2D organisation or linear selection, i.e. full current selection through all the bit-cores of a word during reading

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Read Only Memory (AREA)

Abstract

940,635. Driving arrangements for magnetic storage matrices. E. T. BEAVIS (National Cash Register Co.). April ,16, 1962, No. 14583/62. Heading H3B. A matrix memory system has its column currents controlled through transistors by means of a switching matrix. In the embodiment described, the 2500 columns of a matrix are selected by linear selection through fifty read grounders and fifty read drivers and through - fifty write drivers and fifty write grounders, those driving the column 12 being RG and RD and WD and WG respectively. On switching the appropriate core 20 of a switching matrix S, a pulse is produced by the magnetic flux changing along line 26 (Fig. 4) which causes the read grounder RG to conduct and at the end of the read period a bias current causes the core 20 to switch back the flux travelling along line 29 and causing the write driver WD to conduct. The appropriate read driver RD and write grounder WG are controlled by core 20<SP>1</SP> of switching matrix S1. The read current source RC comprises a constant current source 32 and 34 which is normally shorted to earth by transistor 33 but on applying a signal V R this transistor 33 is cut off and the current flows through the cores 12. The switching matrices are each controlled by 7 flip-flops L1-L7 which select the appropriate core, when a switching pulse V s is applied by means of drivers and grounders selected by diode decoders. It is stated that the diodes 5 of Fig. 1 may be dispensed with by using a larger bias flux H B ,and half switching currents producing a flux H 5 1. The memory matrix may use thin films or ferrite toroids. A current is passed through memory cores 12 when read drivers RD and read grounder RG are switched on by pulses from switching matrices S and S<SP>1</SP> and when a pulse V R is applied to read current source RC. The current source RC comprises a constant current source, comprising a current limiting resistor, NPN transistor 32 and inductor 34, which is normally shorted to earth by PNP transistor 33. The pulse V R cuts off transistor 33 and hence diverts the constant current through the memory system. Write currents are provided in a similar manner. Specification 807,700 is referred to.
GB1458362A 1961-02-23 1962-04-16 Magnetic core memory driving system Expired GB940635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1458362A GB940635A (en) 1961-02-23 1962-04-16 Magnetic core memory driving system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91123A US3195114A (en) 1961-02-23 1961-02-23 Data-storage system
GB1458362A GB940635A (en) 1961-02-23 1962-04-16 Magnetic core memory driving system

Publications (1)

Publication Number Publication Date
GB940635A true GB940635A (en) 1963-10-30

Family

ID=26250649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1458362A Expired GB940635A (en) 1961-02-23 1962-04-16 Magnetic core memory driving system

Country Status (1)

Country Link
GB (1) GB940635A (en)

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