US3869683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable broadband delay line
Assignee: United States Department of the Army
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Filing: 1974-01-25
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Granted: 1975-03-04
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Expires: 1994-01-25
Abstract
Abstract A broadband magnetic bubble delay device having an adjustable delay time. A platelet or film of uniaxial magnetic material which has been appropriately saturated with a two dimensional array of right circular cylindrical domains called magnetic bubbles is immersed in a uniform magnetic field directed transversely to the plane of the film. An evaporated metal launcher electrode is disposed at one end of the film and a detector probe is disposed at the other end. Application of the signal to be delayed to the launcher electrode creates a magnetic field gradient transverse to the plane of the film and causes bubbles near the electrode to vibrate. The vibrations are transmitted to the other end of the film by wave propogation where they are detected by the detector probe and external detector circuitry. The delay is attained by changing the magnitude of the uniform external magnetic field.
Inventors
- 👤 Martin M Sokoloski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/30; G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808; G11C19/0833; G11C27/00; G11C27/02; G11C27/022; H03H2/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
169 words
A magnetic bubble wave shaping apparatus for shaping an input signal in accordance with a desired wave shaping characteristic comprising a film of uniaxial magnetic material saturated with a two dimensional hexagonal array of magnetic bubbles, said film extending in a plane perpendicular to the easy axis of said magnetic material and having at least two opposite ends which are spaced apart by a distance much greater than the nearest neighbor separation of the bubbles in said material, means for producing a magnetic field which is oriented transversely to said plane of said film, means for varying the strength of said field as a function of the distance between said two ends in accordance with said desired wave shaping characteristic, a launcher electrode deposited on said film at one of said two ends and a detector probe deposited on said film at the other of said two ends, whereby the shape of an electrical signal applied to said launcher electrode is modified in accordance with said wave shaping characteristic.
Claim 2
Dependent Claim
169 words
A magnetic bubble wave shaping apparatus for shaping an input signal in accordance with a desired wave shaping characteristic comprising a film of uniaxial magnetic material saturated with a two dimensional hexagonal array of magnetic bubbles, said film extending in a plane perpendicular to the easy axis of said magnetic material and having at least two opposite ends which are spaced apart by a distance much greater than the nearest neighbor separation of the bubbles in said material, means for producing a magnetic field which is oriented transversely to said plane of said film, means for varying the strength of said field as a function of the distance between said two ends in accordance with said desired wave shaping characteristic, a launcher electrode deposited on said film at one of said two ends and a detector probe deposited on said film at the other of said two ends, whereby the shape of an electrical signal applied to said launcher electrode is modified in accordance with said wave shaping characteristic.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 wherein said launcher electrode is substantially straight and extends entirely across said film at said one end.
Claim 4
Dependent Claim
12 words
The apparatus of claim 2 wherein said film is rectangular in shape.
Claim 5
Dependent Claim
20 words
The apparatus of claim 3 wherein said launcher electrode is a thin metallic electrode which is evaporated on said film.
Claim 6
Dependent Claim
25 words
The apparatus of claim 4 wherein said film is on a substrate having a thickness which is substantially greater than the thickness of said film.
Claim 7
Dependent Claim
22 words
The apparatus of claim 5 wherein said detector probe is part of a magnetoresistive detector means for detecting movement of said bubbles.
Claim 8
Dependent Claim
28 words
The apparatus of claim 5 wherein said detector probe is a semiconductor slab which is connected to a means for measuring the Hall-effect induced voltage across said slab.
Claim 9
Dependent Claim
163 words
A magnetic bubble wave shaping apparatus for shaping an input signal in accordance with a desired wave shaping characteristic comprising a film of uniaxial magnetic material saturated with a two dimensional hexagonal array of magnetic bubbles, said film extending in a plane perpendicular to the easy axis of said magnetic material and having at least two opposite ends which are spaced apart by a distance much greater than the nearest neighbor separation of the bubbles in said material, means for producing amagnetic field which is oriented transversely to said plane of said film, means for varying the strength of said field as a function of time in accordance with said desired wave shaping characteristic, a launcher electrode deposited on said film at one of said two ends and a detector probe deposited on said film at the other of said two ends, whereby the shape of an electrical signal applied to said launcher electrode is modified in accordance with said wave shaping characteristic.
Claim 10
Dependent Claim
163 words
A magnetic bubble wave shaping apparatus for shaping an input signal in accordance with a desired wave shaping characteristic comprising a film of uniaxial magnetic material saturated with a two dimensional hexagonal array of magnetic bubbles, said film extending in a plane perpendicular to the easy axis of said magnetic material and having at least two opposite ends which are spaced apart by a distance much greater than the nearest neighbor separation of the bubbles in said material, means for producing amagnetic field which is oriented transversely to said plane of said film, means for varying the strength of said field as a function of time in accordance with said desired wave shaping characteristic, a launcher electrode deposited on said film at one of said two ends and a detector probe deposited on said film at the other of said two ends, whereby the shape of an electrical signal applied to said launcher electrode is modified in accordance with said wave shaping characteristic.
Claim 11
Independent Claim
162 words
A method of wave shaping a first electrical signal in accordance with a desired characteristic comprising tHe steps of, providing a film of uniaxial magnetic material, saturating said material with a two dimensional hexagonal array of magnetic bubbles, immersing said film in a magnetic field which is oriented perpendicular to the plane of said film, inducing vibrations in the bubbles at one end of said film by applying a magnetic field produced by said electrical signal at said one end of said film, the vibrations of said bubbles thereby propagating in the form of a wave to the other end of said film, varying the strength of said magnetic field as a function of the distance between said two ends in accordance with said desired wave shaping characteristic, and transducing the vibrations of the bubbles at said other end thereof back into an electrical signal whereby the shape of said first electrical signal is modified in accordance with said wave shaping characteristic.
Claim 12
Independent Claim
162 words
A method of wave shaping a first electrical signal in accordance with a desired characteristic comprising tHe steps of, providing a film of uniaxial magnetic material, saturating said material with a two dimensional hexagonal array of magnetic bubbles, immersing said film in a magnetic field which is oriented perpendicular to the plane of said film, inducing vibrations in the bubbles at one end of said film by applying a magnetic field produced by said electrical signal at said one end of said film, the vibrations of said bubbles thereby propagating in the form of a wave to the other end of said film, varying the strength of said magnetic field as a function of the distance between said two ends in accordance with said desired wave shaping characteristic, and transducing the vibrations of the bubbles at said other end thereof back into an electrical signal whereby the shape of said first electrical signal is modified in accordance with said wave shaping characteristic.
References Cited (Backward Citations)
US3691540A
Cited
US3793598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |