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US5414670A Expired / Lapsed US ⏱️ 0.0 years remaining

Low power memory array using selective device activation

Assignee: Round Rock Research LLC
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Filing: 1993-01-04
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Granted: 1995-05-09
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Expires: 2013-01-04
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Abstract

Abstract A memory array for an electronic device comprises a design which requires fewer memory devices to be activated to access a plurality of data bits, thereby reducing the amount of power required to access the data bits. The design comprises the use of a plurality of memory devices, each of which has a plurality of arrays and data out lines.

Inventors

  • 👤 Scott Schaefer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-10 01:44
CPC Classifications
G; G11; G11C; G11C7/00; G11C7/22; G11C8/00; G11C8/12

Claims Analysis

Total Claims: 21
Claim 1
Independent Claim 183 words
An array for storing bits of information, the array having a plurality of random access memory devices, and each memory device comprising: a) a plurality of subarrays, each subarray comprising a plurality of bits and one address for each of said bits such that one address corresponds to one bit in each of said subarrays; b) a plurality of data out lines, the number of said data out lines corresponding to the number of said subarrays within one of the memory devices; c) a select line to select the memory device from the plurality of memory devices; d) a power connection electrically coupled with the memory device; and e) a ground connection electrically coupled with the memory device, whereby each memory device can be independently accessed to read from and write to each of said subarrays in one of said memory devices wherein an access to one of said memory devices results in a significant increase in current used by said accessed memory device; f) the array further comprising a memory device having one data out line for supplying a memory parity bit.
Claim 2
Dependent Claim 183 words
An array for storing bits of information, the array having a plurality of random access memory devices, and each memory device comprising: a) a plurality of subarrays, each subarray comprising a plurality of bits and one address for each of said bits such that one address corresponds to one bit in each of said subarrays; b) a plurality of data out lines, the number of said data out lines corresponding to the number of said subarrays within one of the memory devices; c) a select line to select the memory device from the plurality of memory devices; d) a power connection electrically coupled with the memory device; and e) a ground connection electrically coupled with the memory device, whereby each memory device can be independently accessed to read from and write to each of said subarrays in one of said memory devices wherein an access to one of said memory devices results in a significant increase in current used by said accessed memory device; f) the array further comprising a memory device having one data out line for supplying a memory parity bit.
Claim 3
Dependent Claim 23 words
The array of claim 1 wherein each of the memory devices having a plurality of data out lines has at least 16 subarrays.
Claim 4
Dependent Claim 20 words
The array of claim 1 wherein the memory devices reside on a printed circuit board to form a memory module.
Claim 5
Dependent Claim 17 words
The array of claim 1 wherein the memory devices reside on a motherboard of an electronic device.
Claim 6
Dependent Claim 14 words
The array of claim 1 wherein the memory devices are dynamic random access memories.
Claim 7
Dependent Claim 16 words
The array of claim 1 wherein said select line is a row address strobe (RAS) line.
Claim 8
Dependent Claim 59 words
The array of claim 1 wherein said array is installed in an electronic device which provides multiple data out connections and multiple address connections, said electronic device accessing said array to receive a number of stored bits in parallel, said bits being stored in a single memory device with one bit stored in each subarray of the memory device.
Claim 9
Dependent Claim 184 words
A memory module for storing bits of information, the memory module having a plurality of memory devices, and each memory device comprising: a) a plurality of subarrays, each subarray comprising a plurality of bits and one address for each of said bits such that one address corresponds to one bit in each of said subarrays; b) a plurality of data out lines, the number of said data out lines corresponding to the number of said subarrays within one of the memory devices; c) a select line to select the memory device from the plurality of memory devices; d) a power connection electrically coupled with the memory device; and e) a ground connection electrically coupled with the memory device, whereby each memory device can be independently accessed to read from and write to each of said subarrays in one of said memory devices wherein an access to one of said memory devices results in a significant increase in current used by said accessed memory device; f) the memory module further comprising a memory device having one data out line for supplying a memory parity bit.
Claim 10
Dependent Claim 184 words
A memory module for storing bits of information, the memory module having a plurality of memory devices, and each memory device comprising: a) a plurality of subarrays, each subarray comprising a plurality of bits and one address for each of said bits such that one address corresponds to one bit in each of said subarrays; b) a plurality of data out lines, the number of said data out lines corresponding to the number of said subarrays within one of the memory devices; c) a select line to select the memory device from the plurality of memory devices; d) a power connection electrically coupled with the memory device; and e) a ground connection electrically coupled with the memory device, whereby each memory device can be independently accessed to read from and write to each of said subarrays in one of said memory devices wherein an access to one of said memory devices results in a significant increase in current used by said accessed memory device; f) the memory module further comprising a memory device having one data out line for supplying a memory parity bit.
Claim 11
Dependent Claim 24 words
The memory module of claim 8 wherein each of the memory devices having a plurality of data out lines has at least 16 subarrays.
Claim 12
Dependent Claim 16 words
The memory module of claim 8 wherein the memory devices reside on a printed circuit board.
Claim 13
Dependent Claim 15 words
The memory module of claim 8 wherein the memory devices are dynamic random access memories.
Claim 14
Dependent Claim 17 words
The memory module of claim 8 wherein said select line is a row address strobe (RAS) line.
Claim 15
Dependent Claim 62 words
The memory module of claim 8 wherein the memory module is installed in an electronic device which provides multiple data out connections and multiple address connections, said electronic device accessing said memory module to receive a number of stored bits in parallel, said bits being stored in a single memory device with one bit stored in each subarray of the memory device.
Claim 16
Dependent Claim 195 words
A memory array for storing bits of information in a computer, the memory array having a plurality of dynamic random access memory (DRAM) devices, and each DRAM device comprising: a) a plurality of subarrays, each subarray comprising: i) a plurality of bits; ii) one address for each of said bits wherein one address corresponds to one bit in each of said subarrays of the DRAM device; b) a plurality of data lines, the number of said data lines corresponding to the number of said subarrays within one of the DRAM devices; c) a select line to select the DRAM device from the plurality of DRAM devices; d) a power connection electrically coupled with the DRAM device; and e) a ground connection electrically coupled with the DRAM device, each DRAM device in the memory array being independently accessible to read from and write to each of said subarrays in one of said DRAM devices wherein an access to one of the DRAM devices results in a significant increase in current used by said accessed DRAM device; f) the memory array further comprising a DRAM device having one data out line for supplying a memory parity bit.
Claim 17
Dependent Claim 195 words
A memory array for storing bits of information in a computer, the memory array having a plurality of dynamic random access memory (DRAM) devices, and each DRAM device comprising: a) a plurality of subarrays, each subarray comprising: i) a plurality of bits; ii) one address for each of said bits wherein one address corresponds to one bit in each of said subarrays of the DRAM device; b) a plurality of data lines, the number of said data lines corresponding to the number of said subarrays within one of the DRAM devices; c) a select line to select the DRAM device from the plurality of DRAM devices; d) a power connection electrically coupled with the DRAM device; and e) a ground connection electrically coupled with the DRAM device, each DRAM device in the memory array being independently accessible to read from and write to each of said subarrays in one of said DRAM devices wherein an access to one of the DRAM devices results in a significant increase in current used by said accessed DRAM device; f) the memory array further comprising a DRAM device having one data out line for supplying a memory parity bit.
Claim 18
Dependent Claim 23 words
The memory array of claim 14 wherein each of the DRAM devices having a plurality of data lines comprises at least 16 subarrays.
Claim 19
Dependent Claim 21 words
The memory array of claim 14 wherein the DRAM devices reside on a printed circuit board to form a memory module.
Claim 20
Dependent Claim 18 words
The memory array of claim 14 wherein the DRAM devices reside on a motherboard of an electronic device.
Claim 21
Dependent Claim 16 words
The memory of claim 14 wherein said select line is a row address strobe (RAS) line.

References Cited (Backward Citations)

US4881206A Cited
US5089993A Cited
US5089993B1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1998-05-08 1998-11-07 1999-05-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2002-05-08 2002-11-07 2003-05-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2006-05-08 2006-11-07 2007-05-09 $7700.00 Window Closed / Lapsed

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