US3670313A
Expired / Lapsed
US
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Dynamically ordered magnetic bubble shift register memory
Assignee: International Business Machines Corp
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Filing: 1971-03-22
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Granted: 1972-06-13
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Expires: 1991-03-22
Abstract
Abstract This specification discloses a bubble domain memory in which data is arranged for immediacy of access in accordance with its last use. The memory comprises a plurality of parallel shift registers in which data can be accessed in parallel. In other words, each of the shift registers contains a bit of a page or word so that by the performance of one shifting operation all of the bits of the page or word can be accessed. Data in each shift register is arranged in its order of last use so that the access position K of a shift register having K bit positions contains the last bit of information used and the position K-1 preceding the access position K in the shift register contains the bit of data used just previously to the data in the access position K and so on. In these shift registers the shift positions are arranged in loops for shifting the data between the positions of the shift register. Two such loops are provided, one of the loops contains all the shift positions so that data in any position in the shift register can be shifted into the access position K of the register for reading or writing. The other loop contains all the positions of the shift register but the access position K. This second loop is for reordering the data in the shift register in order of last use after data has been shifted into the access position K for reading or writing by the first loop.
Inventors
- 👤 William F Beausoleil
- 👤 David T Brown
- 👤 Ernest L Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:07
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/76; G06F7/78; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
A K position magnetic domain shift register for the storage of data comprising: an accessing position K for accessing the register for reading and writing; (K-1) other positions coupled in a first loop for transferring data between said other positions without placing the data in the accessing position; and control means for inserting and removing said access position into said first loop to form a second loop to transfer data from any one of the (K-1) other positions into the access position for reading or writing whereby data in any bit position can be transferred to the accessing position by the second loop and the data in the other positions can be reordered by the first loop in order of last use.
Claim 2
Dependent Claim
122 words
A K position magnetic domain shift register for the storage of data comprising: an accessing position K for accessing the register for reading and writing; (K-1) other positions coupled in a first loop for transferring data between said other positions without placing the data in the accessing position; and control means for inserting and removing said access position into said first loop to form a second loop to transfer data from any one of the (K-1) other positions into the access position for reading or writing whereby data in any bit position can be transferred to the accessing position by the second loop and the data in the other positions can be reordered by the first loop in order of last use.
Claim 3
Dependent Claim
44 words
The magnetic domain shift register of claim 1 wherein the transfer of data in the second loop to access the data is in one direction and the transfer of the data in the first loop to reorder the data is in the opposite direction.
Claim 4
Dependent Claim
33 words
The magnetic domain shift register of claim 2 including: a magnetic field means for producing a rotating magnetic field which can be reversed to control the direction of data transfer in the loops.
Claim 5
Dependent Claim
33 words
The magnetic domain shift register of claim 3 including: means in said accessing position K for movement of the data within such accessing position while data is being reordered in said first loop.
Claim 6
Dependent Claim
166 words
In K position magnetic domain shift register for the storage of data a first bubble control pattern means for an accessing position K of the register to permit sensing the data in the memory or the placing of new data into the memory; a second bubble control pattern means for (K-1) other positions of the memory arranged in a loop for transferring data between said other positions without placing data into said accessing position of the memory; and electrical control means for selectively inserting said access positions into said first loop to form a second loop to permit data from any one of the (K-1) other positions to be placed into the access position for reading and writing whereby a bit of data in any of the positions of the memory can be placed in the accessing position of the memory and while said bit of data is in said accessing position the data in the other positions can be reordered in order of last use.
Claim 7
Dependent Claim
166 words
In K position magnetic domain shift register for the storage of data a first bubble control pattern means for an accessing position K of the register to permit sensing the data in the memory or the placing of new data into the memory; a second bubble control pattern means for (K-1) other positions of the memory arranged in a loop for transferring data between said other positions without placing data into said accessing position of the memory; and electrical control means for selectively inserting said access positions into said first loop to form a second loop to permit data from any one of the (K-1) other positions to be placed into the access position for reading and writing whereby a bit of data in any of the positions of the memory can be placed in the accessing position of the memory and while said bit of data is in said accessing position the data in the other positions can be reordered in order of last use.
Claim 8
Dependent Claim
43 words
The magnetic domain memory of claim 5 wherein: the transfer of data in the second loop to access the data is in one direction and the transfer of the data in the first loop to reorder the data is in the opposite direction.
Claim 9
Dependent Claim
32 words
The magnetic domain memory of claim 1 including: a magnetic field means for producing a rotating magnetic field which can be reversed to control the direction of data transfer in the loops.
Claim 10
Dependent Claim
36 words
The magnetic domain memory of claim 7 including: a bubble control pattern in said accessing position to cause the movement of the data within said accessing position while data is being reordered in said first loop.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |