JP5185446B2 - Stt−mramのワードライン電圧制御 - Google Patents
Stt−mramのワードライン電圧制御 Download PDFInfo
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- JP5185446B2 JP5185446B2 JP2011533439A JP2011533439A JP5185446B2 JP 5185446 B2 JP5185446 B2 JP 5185446B2 JP 2011533439 A JP2011533439 A JP 2011533439A JP 2011533439 A JP2011533439 A JP 2011533439A JP 5185446 B2 JP5185446 B2 JP 5185446B2
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- voltage
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C8/00—Arrangements for selecting an address in a digital store
- G11C8/08—Word line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, for word lines
-
- 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
- G11C11/1657—Word-line or row 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
- 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
- G11C11/1675—Writing or programming circuits or methods
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mram Or Spin Memory Techniques (AREA)
- Hall/Mr Elements (AREA)
Description
401 ビットセル
405 MTJ
410 ワードライントランジスタ
420 ビットライン
430 ワードライン
432 ワードラインドライバ
440 ソースライン
450 読み出し分離素子
470 感知増幅器
500 書き込みドライバ
502、504 書き込み分離素子
510、520、530 インバータ
600 グラフ
610 基準線
620 ワードライン電圧
702 レベル検出器
704 Vppチャージポンプ
Claims (20)
- ビットラインおよびソースラインに結合された、磁気トンネル接合(MTJ)およびワードライントランジスタを有するビットセルと、
前記ワードライントランジスタのゲートに結合されたワードラインドライバとを備え、
前記ワードラインドライバは、遷移電圧より低い電源電圧に対して前記電源電圧より高いワードライン電圧を供給するように、前記遷移電圧より高い電源電圧に対して前記電源電圧より低い電圧を供給するように構成されるスピン転移トルク磁気抵抗ランダムアクセスメモリ(STT-MRAM)。 - 前記ワードライン電圧は前記遷移電圧に達した後に限界電圧以下にクランプされる請求項1に記載のSTT-MRAM。
- 前記ワードライン電圧は前記遷移電圧に達した後に減少される請求項2に記載のSTT-MRAM。
- 前記遷移電圧は低Vdd領域と高Vdd領域の間の遷移を表す請求項1に記載のSTT-MRAM。
- 前記ビットセルに電気信号を供給して前記ビットセルで論理状態を記憶するように構成された書き込みドライバと、
前記ビットラインとソースラインの間に前記書き込みドライバと直列に結合された少なくとも1つの書き込み分離素子とをさらに備え、
前記書き込み分離素子は読み出し動作中に前記書き込みドライバを分離するように構成される請求項1に記載のSTT-MRAM。 - 前記書き込みドライバは、
データ入力部と前記ビットラインの間に直列に結合された第1および第2のインバータと、
前記データ入力部と前記ソースラインの間に直列に結合された第3のインバータとを備える請求項4に記載のSTT-MRAM。 - 前記ビットセルと感知増幅器の間に挿入された読み出し分離素子をさらに備え、前記読み出し分離素子は、書き込み動作中に前記感知増幅器を前記ビットラインから選択的に分離するように構成される請求項1に記載のSTT-MRAM。
- 前記読み出し分離素子は、スイッチ、伝送ゲート、またはマルチプレクサのうち少なくとも1つである請求項6に記載のSTT-MRAM。
- 前記電源電圧から前記ワードライン電圧を発生させるように構成された電圧ポンプ回路をさらに備える請求項1に記載のSTT-MRAM。
- 前記電源電圧から前記ワードライン電圧を発生させる前記電圧ポンプ回路を制御するように構成されたレベル検出器をさらに備える請求項9に記載のSTT-MRAM。
- スピン転移トルク磁気抵抗ランダムアクセスメモリ(STT-MRAM)における読み出し動作および書き込み動作の方法であって、
書き込み動作中に電源電圧が遷移電圧より低い場合に、ビットセルのワードライントランジスタのゲートに前記電源電圧より高い第1の電圧を印加する段階と、
書き込み動作中に前記電源電圧が遷移電圧より高い場合に、前記ワードライントランジスタに前記電源電圧より低い第2の電圧を印加する段階とを含む方法。 - 前記遷移電圧を超えたところで前記ワードライン電圧を限界電圧以下にクランプして前記第2の電圧を供給する段階をさらに含む請求項11に記載の方法。
- 前記遷移電圧に達した後に前記第2の電圧を減少させて前記第2の電圧を供給する段階をさらに含む請求項11に記載の方法。
- 前記遷移電圧は低Vdd領域と高Vdd領域の間の遷移を表す請求項11に記載の方法。
- チャージポンプ回路を使用して前記電源電圧をポンピングして前記第1の電圧を発生させる段階をさらに含む請求項11に記載の方法。
- 書き込み動作中に電源電圧が遷移電圧より低い場合に、ビットセルのワードライントランジスタのゲートに前記電源電圧より高い第1の電圧を印加する手段と、
書き込み動作中に前記電源電圧が遷移電圧より高い場合に、前記ワードライントランジスタに前記電源電圧より低い第2の電圧を印加する手段とを備えるスピン転移トルク磁気抵抗ランダムアクセスメモリ(STT-MRAM)。 - 前記遷移電圧に達した後に前記ワードライン電圧を限界電圧以下にクランプして前記第2の電圧を供給する手段をさらに備える請求項16に記載のSTT-MRAM。
- 前記遷移電圧に達した後に前記第2の電圧を減少させて前記第2の電圧を供給する手段をさらに備える請求項16に記載のSTT-MRAM。
- 前記遷移電圧は低Vdd領域と高Vdd領域の間の遷移を表す請求項16に記載のSTT-MRAM。
- チャージポンプ回路を使用して前記電源電圧をポンピングして前記第1の電圧を発生させる手段をさらに備える請求項16に記載のSTT-MRAM。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US12/265,044 | 2008-11-05 | ||
US12/265,044 US8107280B2 (en) | 2008-11-05 | 2008-11-05 | Word line voltage control in STT-MRAM |
PCT/US2009/063245 WO2010053970A1 (en) | 2008-11-05 | 2009-11-04 | Word line voltage control in stt-mram |
Publications (2)
Publication Number | Publication Date |
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JP2012506602A JP2012506602A (ja) | 2012-03-15 |
JP5185446B2 true JP5185446B2 (ja) | 2013-04-17 |
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Application Number | Title | Priority Date | Filing Date |
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JP2011533439A Active JP5185446B2 (ja) | 2008-11-05 | 2009-11-04 | Stt−mramのワードライン電圧制御 |
Country Status (9)
Country | Link |
---|---|
US (1) | US8107280B2 (ja) |
EP (1) | EP2353164B1 (ja) |
JP (1) | JP5185446B2 (ja) |
KR (1) | KR101257339B1 (ja) |
CN (1) | CN102203870B (ja) |
BR (1) | BRPI0921432B1 (ja) |
ES (1) | ES2532396T3 (ja) |
TW (1) | TWI436360B (ja) |
WO (1) | WO2010053970A1 (ja) |
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2008
- 2008-11-05 US US12/265,044 patent/US8107280B2/en active Active
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- 2009-11-04 KR KR1020117012971A patent/KR101257339B1/ko active IP Right Grant
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- 2009-11-04 BR BRPI0921432-1A patent/BRPI0921432B1/pt active IP Right Grant
- 2009-11-04 CN CN200980144341.3A patent/CN102203870B/zh active Active
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Also Published As
Publication number | Publication date |
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JP2012506602A (ja) | 2012-03-15 |
CN102203870B (zh) | 2015-04-22 |
ES2532396T3 (es) | 2015-03-26 |
EP2353164B1 (en) | 2014-12-17 |
CN102203870A (zh) | 2011-09-28 |
BRPI0921432B1 (pt) | 2020-10-06 |
EP2353164A1 (en) | 2011-08-10 |
US8107280B2 (en) | 2012-01-31 |
WO2010053970A1 (en) | 2010-05-14 |
US20100110775A1 (en) | 2010-05-06 |
TW201030745A (en) | 2010-08-16 |
KR101257339B1 (ko) | 2013-04-23 |
KR20110093865A (ko) | 2011-08-18 |
TWI436360B (zh) | 2014-05-01 |
BRPI0921432A2 (pt) | 2018-05-29 |
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