Patent US4903343A successfully refreshed from Google Patents.
← Back to Patent Explorer
US4903343A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic digital data storage system

Assignee: MRAM Inc
•
Filing: 1989-01-23
•
Granted: 1990-02-20
•
Expires: 2009-01-23
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A new data storage device that includes one or more digital data storage elements, each element including a magnetic core, and an input addressing portion comprising a magnetic input addressing element for receiving at an input magnetic flux representing a data value and selectively coupling a flux to an output for transmission to a magnetic core in response to addressing flux generated therein. An output element magnetically coupled to a magnetic core detects transitions in magnetic flux in a magnetic core. In addition, the data storage element may further comprise an output addressing portion comprising a magnetic input addressing element for receiving at an input magnetic flux representative of flux in a magnetic core and selectively coupling a flux to an output in response to addressing flux generated therein.

Inventors

  • 👤 David B. Cope
  • 👤 Gary J. Spletter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 09:20
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014; G11C11/06021; G11C11/06028; G11C11/06035; G11C11/08

Claims Analysis

Total Claims: 22
Claim 1
Independent Claim 231 words
A digital data storage element comprising: A. a magnetic core; B. an input addressing portion comprising: i. a laddic-shaped input addressing element having a pair of sidebars and plurality of rungs including an input rung, at least one addressing rung, and a distal rung; ii. an input wire magnetically coupled to said input rung for generating an input flux signal in said addressing element having a direction related to a digital data value; iii. an enabling wire magnetically coupled to said distal rung and said magnetic core for coupling magnetic flux from said distal rung to said magnetic core to generate flux in the magnetic core having a direction reflecting said digital data value; iv. an input addressing wire magnetically coupled to said addressing rung for selectively receiving current to generate magnetic flux in said addressing rung to control coupling of said input flux signal at said input rung to said distal rung for coupling by said enabling wire, the level of said current and the respective dimensions and materials of the addressing rung, said input rung, said distal rung and said sidebars being selected so that the flux generated in the addressing rung substantially saturates the addressing rung, but not the input rung, the distal rung and the sidebars; and C. an output element magnetically coupled to said magnetic core that detects transitions in magnetic flux in said magnetic core.
Claim 2
Dependent Claim 231 words
A digital data storage element comprising: A. a magnetic core; B. an input addressing portion comprising: i. a laddic-shaped input addressing element having a pair of sidebars and plurality of rungs including an input rung, at least one addressing rung, and a distal rung; ii. an input wire magnetically coupled to said input rung for generating an input flux signal in said addressing element having a direction related to a digital data value; iii. an enabling wire magnetically coupled to said distal rung and said magnetic core for coupling magnetic flux from said distal rung to said magnetic core to generate flux in the magnetic core having a direction reflecting said digital data value; iv. an input addressing wire magnetically coupled to said addressing rung for selectively receiving current to generate magnetic flux in said addressing rung to control coupling of said input flux signal at said input rung to said distal rung for coupling by said enabling wire, the level of said current and the respective dimensions and materials of the addressing rung, said input rung, said distal rung and said sidebars being selected so that the flux generated in the addressing rung substantially saturates the addressing rung, but not the input rung, the distal rung and the sidebars; and C. an output element magnetically coupled to said magnetic core that detects transitions in magnetic flux in said magnetic core.
Claim 3
Dependent Claim 115 words
A storage element as defined in claim 1 in which said output element includes an output addressing portion comprising: i. a laddic-shaped output addressing element having a plurality of rungs including an input rung, at least one output addressing rung, and an output rung, ii. an input wire magnetically coupled to said magnetic core and said input rung for generating an input flux signal in said output addressing element; iii. an output wire magnetically coupled to said output rung; and iv. an output addressing wire magnetically coupled to said output addressing rung for selectively controlling coupling of said input flux signal at said input rung to said output rung for coupling by said output wire.
Claim 4
Dependent Claim 66 words
A storage element as defined in claim 2 in which said output addressing element includes a plurality of output addressing rungs, said output addressing portion including a like plurality of output addressing wires each magnetically coupled to one of said output addressing rungs for selectively controlling coupling of said input flux signal at said input rung of s id output addressing element to its output rung.
Claim 5
Dependent Claim 59 words
A storage element as defined in claim 3 wherein said input addressing element includes a plurality of input addressing rungs, said input addressing portion including a like plurality of input addressing wires each magnetically coupled to one of said input addressing rungs for selectively controlling coupling of said input flux signal at said input rung to said distal rung.
Claim 6
Dependent Claim 27 words
A storage element as defined in claim 4 wherein at least some of said input addressing wires are associated with respective ones of said output addressing wires.
Claim 7
Dependent Claim 58 words
A storage element as defined in claim 2 comprising a plurality of input addressing portions and a like plurality of output addressing portions, each input addressing portion having an enabling wire for coupling magnetic flux to said magnetic core and each output addressing portion having an input wire for receiving an input flux signal from said magnetic core.
Claim 8
Dependent Claim 162 words
A digital data storage element comprising: A. a magnetic core; B. a plurality of input addressing portions each comprising: i. a laddic-shaped input addressing element having a plurality of rungs including an input rung, at least one addressing rung, and a distal rung; ii. an input wire magnetically coupled to said input rung for generating an input flux signal in said addressing element having a direction related to a digital data value; ii. an enabling wire magnetically coupled to said distal rung and said magnetic core for coupling magnetic flux from said distal rung to said magnetic core having a direction related to said digital data value; iv. an input addressing wire magnetically coupled to said addressing rung for selectively controlling coupling of said input flux signal at said input rung to said distal rung for coupling by said enabling wire; and C. an output element magnetically coupled to said magnetic core that detects transitions in magnetic flux in said magnetic core.
Claim 9
Dependent Claim 162 words
A digital data storage element comprising: A. a magnetic core; B. a plurality of input addressing portions each comprising: i. a laddic-shaped input addressing element having a plurality of rungs including an input rung, at least one addressing rung, and a distal rung; ii. an input wire magnetically coupled to said input rung for generating an input flux signal in said addressing element having a direction related to a digital data value; ii. an enabling wire magnetically coupled to said distal rung and said magnetic core for coupling magnetic flux from said distal rung to said magnetic core having a direction related to said digital data value; iv. an input addressing wire magnetically coupled to said addressing rung for selectively controlling coupling of said input flux signal at said input rung to said distal rung for coupling by said enabling wire; and C. an output element magnetically coupled to said magnetic core that detects transitions in magnetic flux in said magnetic core.
Claim 10
Dependent Claim 115 words
A storage element as defined in claim 7 in which said output element includes an output addressing portion comprising: i. a laddic-shaped output addressing element having a plurality of rungs including an input rung, at least one output addressing rung, and an output rung, ii. an input wire magnetically coupled to said magnetic core and said input rung for generating an input flux signal in said output addressing element; iii. an output wire magnetically coupled to said output rung; and iv. an output addressing wire magnetically coupled to said output addressing rung for selectively controlling coupling of said input flux signal at said input rung to said output rung for coupling by said output wire.
Claim 11
Dependent Claim 65 words
A storage element as defined in claim 8 in which said output addressing element includes a plurality of output addressing rungs, said output addressing portion including a like plurality of output addressing wires each magnetically coupled to one of said output addressing rungs for selectively controlling coupling of said input flux signal at said input rung of said output addressing element to its output rung.
Claim 12
Dependent Claim 60 words
A storage element as defined in claim 9 wherein each said input addressing element includes a plurality of input addressing rungs, said input addressing portion including a like plurality of input addressing wires each magnetically coupled to one of said input addressing rungs for selectively controlling coupling of said input flux signal at said input rung to said enabling rung.
Claim 13
Dependent Claim 27 words
A storage element as defined in claim 10 wherein at least some of said input addressing wires are associated with respective ones of said output addressing wires.
Claim 14
Dependent Claim 249 words
An addressable storage device comprising: A. a magnetic element including a pair of sidebars and a plurality of rungs extending therebetween and magnetically coupled to said sidebars from an input end to a far end, each pair of rungs defining a window, said magnetic element including an input rung and a distal rung at opposing ends of said sidebars and addressing rungs therebetween; B. input means including input wire means magnetically connected to said input rung for applying an input signal to generate input magnetic flux in said input rung having a direction related to a digital data value; C. a plurality of address wires around separate ones of said addressing rungs from said input rung to said distal rung, said address wires being wound around said rungs and selectively receiving current to generate magnetic flux in said addressing rungs to selectively facilitate coupling of said input magnetic flux from said input end to said distal rung in response to a selected encoding of address signals applied to said address wires, the level of said current and the respective dimensions and materials of the addressing rungs, said input rung, said distal rung and said sidebars being selected so that the flux generated in the addressing rungs substantially saturates the addressing rungs, but not the input rung, the distal rung and the sidebars; and D. output wire means magnetically connected to said distal rung for generating an output signal in response to changes in magnetic flux in said distal rung.
Claim 15
Dependent Claim 249 words
An addressable storage device comprising: A. a magnetic element including a pair of sidebars and a plurality of rungs extending therebetween and magnetically coupled to said sidebars from an input end to a far end, each pair of rungs defining a window, said magnetic element including an input rung and a distal rung at opposing ends of said sidebars and addressing rungs therebetween; B. input means including input wire means magnetically connected to said input rung for applying an input signal to generate input magnetic flux in said input rung having a direction related to a digital data value; C. a plurality of address wires around separate ones of said addressing rungs from said input rung to said distal rung, said address wires being wound around said rungs and selectively receiving current to generate magnetic flux in said addressing rungs to selectively facilitate coupling of said input magnetic flux from said input end to said distal rung in response to a selected encoding of address signals applied to said address wires, the level of said current and the respective dimensions and materials of the addressing rungs, said input rung, said distal rung and said sidebars being selected so that the flux generated in the addressing rungs substantially saturates the addressing rungs, but not the input rung, the distal rung and the sidebars; and D. output wire means magnetically connected to said distal rung for generating an output signal in response to changes in magnetic flux in said distal rung.
Claim 16
Dependent Claim 59 words
An addressable storage device as defined in claim 12 further comprising: A. a core of magnetic material; and B. coupling means for coupling changes in magnetic flux at said distal rung to said core so that changes in the magnetization of said distal rung resulting from said input signal are reflected in changes in the magnetization of said core.
Claim 17
Dependent Claim 68 words
An addressable storage device as defined in claim 13 in which said coupling means comprises a wire magnetically coupled to both said end rung and said core, so that changes in said magnetization of said far end resulting in generation of an electrical pulse in said wire whose magnitude and direction are associated with the change in magnetization, said electrical pulse further generating magnetic flux in said core.
Claim 18
Dependent Claim 297 words
A digital data storage element comprising: A. a magnetic core; B. a plurality of input addressing portions each comprising: i. a laddic-shaped input addressing element having a pair of sidebars and plurality of rungs including an input rung, a plurality of input addressing rungs, and a distal rung; ii. an input wire magnetically coupled to said input rung for generating an input flux signal in said addressing element having a direction related to a digital data value; iii. an input coupling means magnetically coupled to said distal rung and said magnetic core for coupling magnetic flux from said distal rung to said magnetic core having a direction reflecting said digital data value; iv. a plurality of input addressing wires each magnetically coupled to an input addressing rung for selectively receiving current to generate magnetic flux in said addressing rungs to control coupling of said input flux signal at said input rung to said distal rung for coupling by said input coupling means; and C. a plurality of output addressing portions each comprising: i. a laddic-shaped output addressing element having a pair of sidebars and plurality of rungs including an input rung, a plurality of output addressing rungs, and an output rung; ii. an output coupling means magnetically coupled to said core and to said input rung for generating in input flux signal in said input rung of said output addressing element; iii. an output line magnetically coupled to said output rung of said output addressing element; and iv. a plurality of output addressing wires each magnetically coupled to an output addressing rung for selectively receiving current to generate magnetic flux in said output addressing rungs to control coupling of said input flux signal at said input rung to said output rung for coupling by said output wire.
Claim 19
Dependent Claim 297 words
A digital data storage element comprising: A. a magnetic core; B. a plurality of input addressing portions each comprising: i. a laddic-shaped input addressing element having a pair of sidebars and plurality of rungs including an input rung, a plurality of input addressing rungs, and a distal rung; ii. an input wire magnetically coupled to said input rung for generating an input flux signal in said addressing element having a direction related to a digital data value; iii. an input coupling means magnetically coupled to said distal rung and said magnetic core for coupling magnetic flux from said distal rung to said magnetic core having a direction reflecting said digital data value; iv. a plurality of input addressing wires each magnetically coupled to an input addressing rung for selectively receiving current to generate magnetic flux in said addressing rungs to control coupling of said input flux signal at said input rung to said distal rung for coupling by said input coupling means; and C. a plurality of output addressing portions each comprising: i. a laddic-shaped output addressing element having a pair of sidebars and plurality of rungs including an input rung, a plurality of output addressing rungs, and an output rung; ii. an output coupling means magnetically coupled to said core and to said input rung for generating in input flux signal in said input rung of said output addressing element; iii. an output line magnetically coupled to said output rung of said output addressing element; and iv. a plurality of output addressing wires each magnetically coupled to an output addressing rung for selectively receiving current to generate magnetic flux in said output addressing rungs to control coupling of said input flux signal at said input rung to said output rung for coupling by said output wire.
Claim 20
Dependent Claim 32 words
A storage element as defined in claim 15 in which said input coupling means comprises a wire magnetically coupled to both said distal rung of said input addressing element and said core.
Claim 21
Dependent Claim 32 words
A storage element as defined in claim 15 in which said output coupling means comprises a wire magnetically coupled to both said core and said input rung of said output addressing element.
Claim 22
Dependent Claim 24 words
A storage element as defined in claim 15 in which the number of input addressing portions corresponds to the number of output addressing portions.

References Cited (Backward Citations)

US2978176A Cited
US3184722A Cited
US4192013A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-02-19 1993-08-21 1994-02-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-02-19 1997-08-21 1998-02-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-02-19 2001-08-21 2002-02-20 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag