US3643236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage having a plurality of simultaneously accessible locations
Assignee: International Business Machines Corp
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Filing: 1969-12-19
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Granted: 1972-02-15
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Expires: 1989-12-19
Abstract
Abstract In a storage array wherein several locations are simultaneously accessed, each location includes a circuit settable to one of two conditions by signals on lines defining its position. Defining the storage position by three lines, ''''horizontal,'''' ''''vertical'''' and ''''diagonal,'''' each circuit may be selected by activating its diagonal line and either the horizontal or vertical line for that circuit. The storage cell is a solid-stage flip-flop with two cross-coupled active devices and additional active device for each of the three driving lines. Connections to each circuit through selected ones of the vertical and horizontal lines communicate information on the inactivated line.
Inventors
- 👤 Eugene Kolankowsky
- 👤 Robert F Mcmahon
- 👤 David J Perlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:54
CPC Classifications
G; G11; G11C; G11C8/00; G11C8/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
A storage array, capable of having two multibit word locations simultaneously accessed by two different interrogators and providing independent signals to both interrogators, comprising: a plurality of bistable storage circuits arranged in a number, equal to the number of bits in a word, of two-dimensional arrays, each circuit associated with three input lines and two output line sets and accessible by coincident activation of two of the input lines so that each of the bistable storage circuits may be simultaneously accessed by two different interrogators independently of one another and give separate output signals on the output lines without conflict; three decoding and driving means, connected to the input lines, operable to activate aforesaid two lines at a time for each of the two different interrogators; two sensing and driving means, connected to the output line sets, each selectable for simultaneously communicating information to the two different interrogators from two accessed locations; and means connected to said sensing and driving means for selecting one thereof.
Claim 2
Dependent Claim
165 words
A storage array, capable of having two multibit word locations simultaneously accessed by two different interrogators and providing independent signals to both interrogators, comprising: a plurality of bistable storage circuits arranged in a number, equal to the number of bits in a word, of two-dimensional arrays, each circuit associated with three input lines and two output line sets and accessible by coincident activation of two of the input lines so that each of the bistable storage circuits may be simultaneously accessed by two different interrogators independently of one another and give separate output signals on the output lines without conflict; three decoding and driving means, connected to the input lines, operable to activate aforesaid two lines at a time for each of the two different interrogators; two sensing and driving means, connected to the output line sets, each selectable for simultaneously communicating information to the two different interrogators from two accessed locations; and means connected to said sensing and driving means for selecting one thereof.
Claim 3
Dependent Claim
25 words
The array of claim 1, wherein each circuit comprises a solid-state storage cell including a plurality of active devices cross-coupled to function as a flip-flop.
Claim 4
Dependent Claim
34 words
The array of claim 2, wherein each flip-flop comprises two active devices and there are provided two additional active devices associated with each line to function as gates upon activation of the associated line.
Claim 5
Dependent Claim
42 words
The array of claim 1, wherein each circuit is associated with a horizontal, vertical and diagonal line and the coincident activation of the diagonal line and a selected one of the horizontal and vertical lines permits communication of information with the circuit.
Claim 6
Dependent Claim
35 words
The array of claim 4, wherein each circuit comprises a solid-state storage cell, on a substrate containing a plurality of like cells, including a plurality of active devices and cross-coupled to functIon as a flip-flop.
Claim 7
Dependent Claim
34 words
The array of claim 5, wherein each flip-flop comprises two active devices and there are provided two additional active devices associated with each line to function as gates upon activation of the associated line.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |