US3737859A
Expired / Lapsed
US
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Selection matrix protected against overcharging and designed for a data memory having random access
Assignee: Siemens AG
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Filing: 1972-03-21
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Granted: 1973-06-05
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Expires: 1992-03-21
Abstract
Abstract A selection matrix for a data memory having random access and which is dimensioned for a medium loading such as exists during normal operation and to which a control device is assigned which ensures that even in exceptional cases such as constant order the selection circuits are not overloaded the selection matrix employing a control system constructed as a selection matrix, two groups of control signal generators each corresponding to lines and columns of the selection matrix by which individual control signal generators may be selected.
Inventors
- 👤 H Kadow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
A selection matrix for a data memory having random access, comprising: a matrix including a plurality of first control signal generators and a plurality of second control signal generators corresponding to columns and rows of the matrix and means for selecting a control signal generator from each plurality for periods of time corresponding to read or write operations of the memory, said control signal generators each including a timing circuit and operable to provide their respective control signals when the selection time is greater than the time defined by the timing circuits.
Claim 2
Dependent Claim
92 words
A selection matrix for a data memory having random access, comprising: a matrix including a plurality of first control signal generators and a plurality of second control signal generators corresponding to columns and rows of the matrix and means for selecting a control signal generator from each plurality for periods of time corresponding to read or write operations of the memory, said control signal generators each including a timing circuit and operable to provide their respective control signals when the selection time is greater than the time defined by the timing circuits.
Claim 3
Dependent Claim
41 words
A selection matrix according to claim 1, wherein said means for selecting includes a pair of decoDing networks connected to the respective pluralities of first and second control signal generators for receiving and decoding signals which identify separate control signal generators.
Claim 4
Dependent Claim
71 words
A selection matrix according to claim 1, comprising first and second OR gates connected to and logically combining the outputs of the respective pluralities of control signal generators, and an AND gate connected to and logically combining the outputs of said OR gates, said AND gate having an output for providing an output control signal upon activation of a control signal generator from each of said pluralities of control signal generators.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |