US3676871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Domain logic arrangement
Assignee: AT&T Inc
•
Filing: 1971-05-21
•
Granted: 1972-07-11
•
Expires: 1991-05-21
Abstract
Abstract A single wall domain logic arrangement is defined by a serpentine propagation conductor in a layer of material in which single wall domains can be moved. The conductor, when energized, provides a drive field for domains in a number of channels between a plurality of inputs and outputs. The arrangement exhibits a signal at outputs determined by the pattern of domains at the inputs.
Inventors
- 👤 John Alexander Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:32
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
An arrangement comprising a layer of material in which single wall domains can be moved, and means for defining in said layer first, second, and third multistage channels for said domains, said last-mentioned means including an electrical conductor of a serpentine geometry for defining a plurality of stages for each of said channels, said geometry having a modification therein for moving to said second channel a domain in one of said first or third channel in the absence of a domain in a corresponding stage of the other of said first or third channel when said conductor is activated, said arrangement also comprising means for introducing domains selectively to said first and second channels.
Claim 2
Dependent Claim
114 words
An arrangement comprising a layer of material in which single wall domains can be moved, and means for defining in said layer first, second, and third multistage channels for said domains, said last-mentioned means including an electrical conductor of a serpentine geometry for defining a plurality of stages for each of said channels, said geometry having a modification therein for moving to said second channel a domain in one of said first or third channel in the absence of a domain in a corresponding stage of the other of said first or third channel when said conductor is activated, said arrangement also comprising means for introducing domains selectively to said first and second channels.
Claim 3
Dependent Claim
23 words
An arrangement in accordance with claim 1 also including means for detecting the presence or absence of a domain in said second channel.
Claim 4
Dependent Claim
64 words
An arrangement in accordance with claim 2 wherein said modification is of a geometry such that the presence of first and second domains in like stages of said first and third channels respectively inhibits movement of either of said first and second domains into said second channel, and means for detecting the presence and absence of a domain in said first and third channels.
Claim 5
Dependent Claim
75 words
An arrangement in accordance with claim 3 wherein said modification includes a first portion of said conductor defining a first stage of said channel wherein said first portion includes first and second straight line sections disposed at a first angle with respect to one another so that a signal applied to the conductor generates at said first position a field tending to move a domain in the direction of a line bisecting said first angle.
Claim 6
Dependent Claim
77 words
An arrangement in accordance with claim 4 wherein said modification also includes a second portion of said conductor defining a second stage of said channel wherein said second portion also includes first and second straight line sections disposed at a first angle with respect to one another so that a signal applied to the conductor generates at said first portion a field tending to move a domain in the direction of a line bisecting said first angle.
Claim 7
Dependent Claim
33 words
An arrangement in accordance with claim 5 also including means for applying a bipolar signal to said conductor for generating drive fields of a first value for moving said domains in said channels.
Claim 8
Dependent Claim
38 words
An arrangement in accordance with claim 6 also including means for providing a bias field in said layer of a second value sufficiently greater than said first value for maintaining a constant geometry for said domains when moved.
Claim 9
Dependent Claim
95 words
An arrangement comprising a layer of material in which single wall domains can be moved, and means for defining in said layer first, second, and third propagation channels for said domains, said last-mentioned means comprising a conductor arrangement including a conductor of serpentine geometry having in a portion thereof straight line sections disposed at angles to one another in a manner to move domains from said first or third channel to said second when said conductor is pulsed in the absence of a domain moving synchronously in the other of said first or third channel.
Claim 10
Dependent Claim
95 words
An arrangement comprising a layer of material in which single wall domains can be moved, and means for defining in said layer first, second, and third propagation channels for said domains, said last-mentioned means comprising a conductor arrangement including a conductor of serpentine geometry having in a portion thereof straight line sections disposed at angles to one another in a manner to move domains from said first or third channel to said second when said conductor is pulsed in the absence of a domain moving synchronously in the other of said first or third channel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |