JP4517842B2 - 磁気メモリデバイス - Google Patents
磁気メモリデバイス Download PDFInfo
- Publication number
- JP4517842B2 JP4517842B2 JP2004355507A JP2004355507A JP4517842B2 JP 4517842 B2 JP4517842 B2 JP 4517842B2 JP 2004355507 A JP2004355507 A JP 2004355507A JP 2004355507 A JP2004355507 A JP 2004355507A JP 4517842 B2 JP4517842 B2 JP 4517842B2
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- JP
- Japan
- Prior art keywords
- current
- circuit
- magnetoresistive
- memory device
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/165—Auxiliary circuits
- G11C11/1653—Address circuits or decoders
- G11C11/1655—Bit-line or column circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/165—Auxiliary circuits
- G11C11/1659—Cell access
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/165—Auxiliary circuits
- G11C11/1673—Reading or sensing circuits or methods
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/06—Sense amplifiers; Associated circuits, e.g. timing or triggering circuits
- G11C7/062—Differential amplifiers of non-latching type, e.g. comparators, long-tailed pairs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2207/00—Indexing scheme relating to arrangements for writing information into, or reading information out from, a digital store
- G11C2207/06—Sense amplifier related aspects
- G11C2207/063—Current sense amplifiers
Description
2a,2b 磁気抵抗効果発現体
Ib1,Ib2,Iw1,Iw2 電流
25,25A 定電流回路群
32 X方向アドレスデコーダ回路
41,41A 前段回路
M,M1 磁気メモリデバイス
Claims (6)
- (i+1)行(j+1)列(i,jは1以上の整数)で二次元状に配列された複数の記憶セルを備えた磁気メモリデバイスであって、
前記各記憶セルには、1または2以上の磁気抵抗効果発現体がそれぞれ配設され、
前記磁気抵抗効果発現体の抵抗値を感知するための第1の電流を供給する第1の電流供給回路と、
前記磁気抵抗効果発現体に第2の電流を供給する第2の電流供給回路と、
前記第1の電流および前記第2の電流の合計値を一定に制御する電流制御回路とを備えている磁気メモリデバイス。 - 前記各記憶セルには、前記磁気抵抗効果発現体がそれぞれ2つ配設され、
前記各磁気抵抗効果発現体には、前記電流制御回路がそれぞれ1つ接続され、
前記第1電流供給回路は、前記第1の電流を感知用電圧に変換する感知用抵抗を2つ備え、
前記第2の電流供給回路は、前記第2の電流を前記各磁気抵抗効果発現体にそれぞれ供給し、
前記各電流制御回路は、前記各感知用抵抗を流れる前記第1の電流、および前記各磁気抵抗効果発現体を流れる前記第2の電流の合計値をそれぞれ一定に制御する請求項1記載の磁気メモリデバイス。 - 前記各感知用抵抗によってそれぞれ変換された前記各感知用電圧の電圧差に基づいて作動して前記各記憶セルに記憶されている情報を読み出す差動増幅回路を備えている請求項2記載の磁気メモリデバイス。
- 前記各記憶セルには、前記磁気抵抗効果発現体がそれぞれ1つ配設され、
当該磁気抵抗効果発現体には、前記電流制御回路が接続され、
前記第1の電流供給回路は、前記第1の電流を感知用電圧に変換する感知用抵抗を備え、
前記第2の電流供給回路は、前記第2の電流を前記磁気抵抗効果発現体に供給する請求項1記載の磁気メモリデバイス。 - 前記感知用抵抗によって変換された前記感知用電圧と基準電圧との電圧差に基づいて作動して前記各記憶セルに記憶されている情報を読み出す差動増幅回路を備えている請求項4記載の磁気メモリデバイス。
- 前記感知用抵抗は、その抵抗値が前記磁気抵抗効果発現体の前記抵抗値よりも2倍以上大きな抵抗値に規定されている請求項2から5のいずれかに記載の磁気メモリデバイス。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004355507A JP4517842B2 (ja) | 2004-12-08 | 2004-12-08 | 磁気メモリデバイス |
PCT/JP2005/022425 WO2006062113A1 (ja) | 2004-12-08 | 2005-12-07 | 磁気メモリセルの読出し装置 |
US11/721,141 US7808813B2 (en) | 2004-12-08 | 2005-12-07 | Magnetic memory cell reading apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004355507A JP4517842B2 (ja) | 2004-12-08 | 2004-12-08 | 磁気メモリデバイス |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006164421A JP2006164421A (ja) | 2006-06-22 |
JP4517842B2 true JP4517842B2 (ja) | 2010-08-04 |
Family
ID=36577940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004355507A Active JP4517842B2 (ja) | 2004-12-08 | 2004-12-08 | 磁気メモリデバイス |
Country Status (3)
Country | Link |
---|---|
US (1) | US7808813B2 (ja) |
JP (1) | JP4517842B2 (ja) |
WO (1) | WO2006062113A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01149291A (ja) * | 1987-12-04 | 1989-06-12 | Nec Corp | 半導体記憶装置 |
JPH117778A (ja) * | 1997-06-18 | 1999-01-12 | Nec Corp | 電流検出型センスアンプ |
JP2004280910A (ja) * | 2003-03-13 | 2004-10-07 | Tdk Corp | 磁気メモリデバイスおよびその読出方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4046513B2 (ja) * | 2002-01-30 | 2008-02-13 | 株式会社ルネサステクノロジ | 半導体集積回路 |
KR100515053B1 (ko) * | 2002-10-02 | 2005-09-14 | 삼성전자주식회사 | 비트라인 클램핑 전압 레벨에 대해 안정적인 독출 동작이가능한 마그네틱 메모리 장치 |
JP4365576B2 (ja) | 2002-11-22 | 2009-11-18 | Tdk株式会社 | 磁気メモリデバイスおよび書込電流駆動回路、並びに書込電流駆動方法 |
US6775195B1 (en) * | 2003-02-28 | 2004-08-10 | Union Semiconductor Technology Center | Apparatus and method for accessing a magnetoresistive random access memory array |
JP4419408B2 (ja) * | 2003-03-14 | 2010-02-24 | Tdk株式会社 | 磁気抵抗効果素子および磁気メモリデバイス |
JP4492052B2 (ja) * | 2003-08-21 | 2010-06-30 | Tdk株式会社 | 磁気記憶セルおよび磁気メモリデバイス |
JP2006294155A (ja) * | 2005-04-13 | 2006-10-26 | Tdk Corp | 磁気メモリデバイス |
JP4779487B2 (ja) * | 2005-07-25 | 2011-09-28 | Tdk株式会社 | 磁気メモリデバイス |
-
2004
- 2004-12-08 JP JP2004355507A patent/JP4517842B2/ja active Active
-
2005
- 2005-12-07 WO PCT/JP2005/022425 patent/WO2006062113A1/ja active Application Filing
- 2005-12-07 US US11/721,141 patent/US7808813B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01149291A (ja) * | 1987-12-04 | 1989-06-12 | Nec Corp | 半導体記憶装置 |
JPH117778A (ja) * | 1997-06-18 | 1999-01-12 | Nec Corp | 電流検出型センスアンプ |
JP2004280910A (ja) * | 2003-03-13 | 2004-10-07 | Tdk Corp | 磁気メモリデバイスおよびその読出方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2006164421A (ja) | 2006-06-22 |
WO2006062113A1 (ja) | 2006-06-15 |
US20090290405A1 (en) | 2009-11-26 |
US7808813B2 (en) | 2010-10-05 |
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