← Back to Patent Explorer
EP0211385A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Memory device

Assignee: Toshiba Corp
•
Filing: 1986-07-30
•
Granted: —
•
Expires: 2006-07-30
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A RAM (40) cyclically inputs and outputs data at different addresses which are cyclically designated at successive clock pulses by a counter (50) and shift register(60) which outputs an address value successively increasing or decreasing by one. The output of the circuit is via an OR gate (83) which receives the output of the RAM (40) via an AND gate (81) to which an inverted initialisation signal (INIT) is also applied, and also via the output of a further AND gate (82) to which both the initialisation signal and the shift register output are fed.

Inventors

  • 👤 Masahiko Sumi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 12:31
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/76; G06F7/78; G06F7/785; G06F5/00; G06F5/06; G06F5/16; G11; G11C; G11C8/00; G11C8/04

Claims Analysis

Total Claims: 15
Claim 1
Independent Claim 65 words
A memory devi-e comprising: a) addressing means (30) for cyclically designat­ing different values as addresses for input and output of data per each clock inputted during one operation sequence; and b) memory means (20) having a capacity of plural bits, said memory means (20) cyclically inputting data at different addresses designated by said addressing means (30) and cyclically outputting the data from the designated addresses.
Claim 2
Dependent Claim 65 words
A memory devi-e comprising: a) addressing means (30) for cyclically designat­ing different values as addresses for input and output of data per each clock inputted during one operation sequence; and b) memory means (20) having a capacity of plural bits, said memory means (20) cyclically inputting data at different addresses designated by said addressing means (30) and cyclically outputting the data from the designated addresses.
Claim 3
Dependent Claim 90 words
A memory device comprising: a) addressing means (30) for cyclically designat­ing different values as addresses for input and output of data per each clock inputted during each operation sequence; and b) memory means (20) having a capacity of plural bits, said memory means (20) cyclically outputting data stored at different addresses designated by said addressing means (30) and at the same time cyclically writing new data at the designated addresses, said data outputted from said memory means (20) being fed back to the input side of said memory means (20).
Claim 4
Dependent Claim 90 words
A memory device comprising: a) addressing means (30) for cyclically designat­ing different values as addresses for input and output of data per each clock inputted during each operation sequence; and b) memory means (20) having a capacity of plural bits, said memory means (20) cyclically outputting data stored at different addresses designated by said addressing means (30) and at the same time cyclically writing new data at the designated addresses, said data outputted from said memory means (20) being fed back to the input side of said memory means (20).
Claim 5
Dependent Claim 153 words
A memory device comprising: a) addressing means (30) for cyclically designat­ing different values as addresses for input and output of data per each clock inputted of a one-sequence clock signal; b) a flip-flop (31) which inverts its state responsive to the completion of acknowledgement of said one-­sequence clock signal; and c) two memory means (20a, 20b) each having a capacity of plural bits, said two memory means (20a, 20b) having a common data input, different addresses designated by said addressing means (30) being used as a common address input of said two memory means, said two memory means cyclically inputting data at said different addresses designated by said addressing means (30) or outputting data at said different addresses designated, said two memory means (20a, 20b) being such that one is placed in a read state while the other is placed in a write state in response to a designation from said flip-flop (31).
Claim 6
Dependent Claim 153 words
A memory device comprising: a) addressing means (30) for cyclically designat­ing different values as addresses for input and output of data per each clock inputted of a one-sequence clock signal; b) a flip-flop (31) which inverts its state responsive to the completion of acknowledgement of said one-­sequence clock signal; and c) two memory means (20a, 20b) each having a capacity of plural bits, said two memory means (20a, 20b) having a common data input, different addresses designated by said addressing means (30) being used as a common address input of said two memory means, said two memory means cyclically inputting data at said different addresses designated by said addressing means (30) or outputting data at said different addresses designated, said two memory means (20a, 20b) being such that one is placed in a read state while the other is placed in a write state in response to a designation from said flip-flop (31).
Claim 7
Dependent Claim 30 words
A memory device as set forth in claim 2, wherein said memory means (20) is provided with switch means (21) for selectively input said feedback data or said new data.
Claim 8
Dependent Claim 28 words
A memory device as set forth in claim 4, wherein said switch means (21) is comprised of a gate circuit which operates in response to a switching signal.
Claim 9
Dependent Claim 31 words
A memory device as set forth in claim 2, wherein said count value holding means is comprised of a random number generator circuit which does not repeatedly output the same value.
Claim 10
Dependent Claim 33 words
A memory device as set forth in claim 1, wherein said addressing means (30) is comprised of a random number generator circuit which does not repeatedly generate the same value during each cycle.
Claim 11
Dependent Claim 34 words
A memory device as set forth in claim 1, 2 or 3, wherein said addressing means is comprised of a presettable counter (60) to output a value successively increasing or decreasing one by one.
Claim 12
Dependent Claim 17 words
A memory device as set forth in claim 8, wherein said counter (50) outputs a descrete value.
Claim 13
Dependent Claim 30 words
A memory device as set forth in claim 8 or 9, wherein said counter (50) is provided with count value holding means to designate a count value to be outputted.
Claim 14
Dependent Claim 22 words
A memory device as set forth in claim 10, wherein said count value holding means is comprised of a shift register (60).
Claim 15
Dependent Claim 22 words
A memory device as set forth in claim 10, wherein said count value holding means is comprised of read only memory device.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag