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US3851313A Expired / Lapsed US ⏱️ 0.0 years remaining

Memory cell for sequentially addressed memory array

Assignee: Texas Instruments Inc
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Filing: 1973-02-21
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Granted: 1974-11-26
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Expires: 1993-02-21
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Abstract

Abstract Disclosed is a sequentially addressed memory array having rows and columns of memory cells with all cells in a respective column having commonly coupled write enable terminals and also commonly coupled read enable terminals. All memory cells in a respective row have read input/write output terminals commonly coupled for providing input information to and output data from the row of cells. A commutator addresses the cells in a periodic and alternate cycle wherein data is respectively read out of one column, written into one of the adjacent columns, read out of the other adjacent column, and finally written into the one column, in sequence.

Inventors

  • 👤 K Chang

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 12:59
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/4063; G11C11/407; G11C11/408; G11C11/4085; G11C11/402; G11C11/4026; G11C11/403; G11C11/405; G11C19/00; G11C19/18; G11C19/182; G11C19/188; G11C7/00; G11C7/10; G11C7/1006; G11C8/00; G11C8/04

Claims Analysis

Total Claims: 22
Claim 1
Independent Claim 158 words
The method of addressing an array of selectively addressable memory cells arranged in rows and columns with all cells in a respective column having common write enable terminals and common read enable terminals and all cells in respective rows having common read input terminals and common write output terminals commonly coupled by a read/write means, comprising the steps of: a. addressing one column of read enable terminals for reading information from the cells of said one column onto the respective read/write means; b. addressing the write enable terminals of the right adjacent column to thereby write into said right adjacent column from said read/write means; c. addressing the read enable terminals of the left adjacent column to thereby read onto the read/write means the contents of the cells of said other column; and d. addressing the write enable terminals of said one column to thereby write into each cell of said each column from the respective read/write means.
Claim 2
Independent Claim 158 words
The method of addressing an array of selectively addressable memory cells arranged in rows and columns with all cells in a respective column having common write enable terminals and common read enable terminals and all cells in respective rows having common read input terminals and common write output terminals commonly coupled by a read/write means, comprising the steps of: a. addressing one column of read enable terminals for reading information from the cells of said one column onto the respective read/write means; b. addressing the write enable terminals of the right adjacent column to thereby write into said right adjacent column from said read/write means; c. addressing the read enable terminals of the left adjacent column to thereby read onto the read/write means the contents of the cells of said other column; and d. addressing the write enable terminals of said one column to thereby write into each cell of said each column from the respective read/write means.
Claim 3
Dependent Claim 24 words
The method of addressing according to claim 1 and further including precharging said read/write means immediately prior to each of said steps of addressing.
Claim 4
Dependent Claim 76 words
The method according to claim 2 wherein a sequence of steps consisting of precharging the read/write lines, addressing a column of read terminals, precharging the read/write lines, and addressing the write enable columns, comprises one state time and said step of addressing one column of read enable terminals includes the steps of: a. delaying said information one and one-half state time; and thereafter b. impressing said information onto said read/write means to thereby recirculate said information.
Claim 5
Dependent Claim 74 words
The method according to claim 2 wherein a sequency of steps consisting of precharging the read/write lines, addressing a column of read terminals, precharging the read/write lines, and addressing the write enable columns, comprises one state time and said step of addressing one column of read enable terminals includes: a. delaying said information one and one-half state times; and thereafter b. impressing said information onto said read/write means to thereby right shift said information.
Claim 6
Dependent Claim 258 words
In a memory system: a plurality of identical memory cells arranged in an array of rows and columns; each memory cell comprising a data input terminal, a data output terminal, capacitive data storing means, a reference potential source, and first, second and third switching devices each having an output cirCuit and a control terminal, the output circuits of the first and second switching devices being connected in series between said potential source and the data output terminal, the capacitive data storing means being connected between the potential source and the control terminal of the first switching device, the output circuit of the third switching device being connected between the data input terminal and the control terminal of the first switching device, the data input terminal and data output terminal being directly connected together and coupled to data input/output means; means connecting the data input/output means of each separate row of the cells in common; first address means connecting the control terminals of all of the second switching devices of each separate column of cells in common; second address means connecting the control terminals of all of the third switching devices of each separate column in common; and means for actuating the first and second address means in an ordered sequence wherein the columns are addressed in overlapping manner by actuating the second address means of a given column, then actuating the first address means of the preceding column, then actuating the second address means of the succeeding column, then actuating the first address means of said given column.
Claim 7
Dependent Claim 258 words
In a memory system: a plurality of identical memory cells arranged in an array of rows and columns; each memory cell comprising a data input terminal, a data output terminal, capacitive data storing means, a reference potential source, and first, second and third switching devices each having an output cirCuit and a control terminal, the output circuits of the first and second switching devices being connected in series between said potential source and the data output terminal, the capacitive data storing means being connected between the potential source and the control terminal of the first switching device, the output circuit of the third switching device being connected between the data input terminal and the control terminal of the first switching device, the data input terminal and data output terminal being directly connected together and coupled to data input/output means; means connecting the data input/output means of each separate row of the cells in common; first address means connecting the control terminals of all of the second switching devices of each separate column of cells in common; second address means connecting the control terminals of all of the third switching devices of each separate column in common; and means for actuating the first and second address means in an ordered sequence wherein the columns are addressed in overlapping manner by actuating the second address means of a given column, then actuating the first address means of the preceding column, then actuating the second address means of the succeeding column, then actuating the first address means of said given column.
Claim 8
Dependent Claim 35 words
A memory system according to claim 5 wherein the means for actuating the address means functions to actuate only one of the address means on only one column in the array at any given time.
Claim 9
Dependent Claim 67 words
A memory system according to claim 5 wherein the first, second and third switching devices are MOS transistors, wherein the array is in the form of an integrated semiconductor chip, wherein the data input and data output terminals are connected together by elongated regions of semiconductor material in the semiconductor chip, and wherein the first and second address means comprises metal film strips on the semiconductor chip.
Claim 10
Dependent Claim 45 words
A memory system according to claim 7 and including left shift and right shift delay means provided on the chip for coupling the data input and data output terminals of each row to provide time delayed reinsertion of bits read out of a given cell.
Claim 11
Dependent Claim 106 words
A selectively addressable memory system comprising: a. a random access memory array having rows and columns of selectively addressable memory cells having read, write, read enable, and write enable terminals with all read enable terminals in a respective column commonly coupled, and all write enable terminals in a respective column commonly coupled, all read terminals in a respective row commonly coupled, and all write terminals in a respective row commonly coupled; b. means commonly coupling said read and write terminals for selectively conveying input and output data to and from said cells; and c. commutator means for cyclically addressing individual columns in an ordered bidirectional sequence.
Claim 12
Dependent Claim 106 words
A selectively addressable memory system comprising: a. a random access memory array having rows and columns of selectively addressable memory cells having read, write, read enable, and write enable terminals with all read enable terminals in a respective column commonly coupled, and all write enable terminals in a respective column commonly coupled, all read terminals in a respective row commonly coupled, and all write terminals in a respective row commonly coupled; b. means commonly coupling said read and write terminals for selectively conveying input and output data to and from said cells; and c. commutator means for cyclically addressing individual columns in an ordered bidirectional sequence.
Claim 13
Dependent Claim 48 words
The memory system of claim 9 wherein said commutator means includes means for periodically addressing, in sequence, read enable terminals of one column, write enable terminals of one adjacent column, and read enable terminals of the other adjacent column and write enable terminals of said one column, respectively.
Claim 14
Dependent Claim 21 words
The memory system of claim 9 wherein said input and output data means commonly connects said read and said write terminals.
Claim 15
Dependent Claim 49 words
The memory system of claim 11 wherein said commutator means includes: a. a multiphase signal generator providing a multi-phase signal, said phase representing a state time; and b. logic means responsive to said signal generator for selectively addressing columns of said read and write enable terminals individually and alternately.
Claim 16
Dependent Claim 52 words
The memory system of claim 12 wherein said signal generator provides said multi-phase signal having phases equal in number to the number of said columns, wherein each of said phases consists of a logic one signal interval and a logic zero signal interval and said logic one leVel represents a state time.
Claim 17
Dependent Claim 25 words
The memory system of claim 13 wherein said first plurality of phased clock signals comprises two signals, occurring in a period of one state time.
Claim 18
Dependent Claim 21 words
The memory system of claim 12 wherein said logic means is further responsive to a first plurality of phased clock signals.
Claim 19
Dependent Claim 27 words
The memory system of claim 15 and further including means responsive to a second plurality of phased clock signals for selectively precharging said read and write means.
Claim 20
Dependent Claim 46 words
The memory system of claim 16 and further including recirculate means comprising a signal delay means of one and one-half state times responsive to one of said second plurality of clock signals for rewriting said output data into the respective cells from which it was read.
Claim 21
Dependent Claim 36 words
The memory system of claim 17 and further including right shift means responsive to one of said second plurality of phased clock signals for right shifting said output signals from one column into the adjacent column.
Claim 22
Dependent Claim 20 words
The memory system of claim 18 wherein said right shift means comprises a signal delay means of one-half state time.

References Cited (Backward Citations)

US2825889A Cited
US3585613A Cited
US3651491A Cited
US3699539A Cited
US3731287A Cited
US3761899A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-25 1978-05-27 1978-11-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-25 1982-05-27 1982-11-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-25 1986-05-27 1986-11-26 $7700.00 Window Closed / Lapsed

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