JP4274870B2 - 2ビットセルメモリにてダイナミックリファレンスを利用するシステム - Google Patents
2ビットセルメモリにてダイナミックリファレンスを利用するシステム Download PDFInfo
- Publication number
- JP4274870B2 JP4274870B2 JP2003274071A JP2003274071A JP4274870B2 JP 4274870 B2 JP4274870 B2 JP 4274870B2 JP 2003274071 A JP2003274071 A JP 2003274071A JP 2003274071 A JP2003274071 A JP 2003274071A JP 4274870 B2 JP4274870 B2 JP 4274870B2
- Authority
- JP
- Japan
- Prior art keywords
- cell
- core
- reference cell
- dynamic reference
- core cell
- 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.)
- Expired - Lifetime
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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
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
- G11C11/5621—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using charge storage in a floating gate
-
- 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
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
- G11C11/5621—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using charge storage in a floating gate
- G11C11/5642—Sensing or reading circuits; Data output circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/26—Sensing or reading circuits; Data output circuits
- G11C16/28—Sensing or reading circuits; Data output circuits using differential sensing or reference cells, e.g. dummy cells
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2211/00—Indexing scheme relating to digital stores characterized by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C2211/56—Indexing scheme relating to G11C11/56 and sub-groups for features not covered by these groups
- G11C2211/563—Multilevel memory reading aspects
- G11C2211/5634—Reference cells
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Read Only Memory (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
Description
104,106 中央ライン
108,110 検出マージン
202 リファレンスセルの電圧閾値
300 システム
302,304 電流/電圧変換器
306 定電流源
400 システム
402 電流ミラー回路
404 スタティックリファレンスセル
406 ダイナミックリファレンスセル
408 コアセル
Claims (2)
- メモリ装置におけるコアセル領域内の2ビットコアセルをプログラムする方法であって、前記メモリ装置は、前記コアセル領域内にあり前記コアセルと同一のワードラインに接続されたダイナミックリファレンスセルと、前記コアセル領域外にあるスタティックリファレンスセルと、前記コアセル領域外にあり前記スタティックリファレンスセルに接続された電流ミラー回路と、を有し、当該方法は:
前記スタティックリファレンスセルを利用して前記ダイナミックリファレンスセルをプログラムするステップ;及び
前記ダイナミックリファレンスセルを利用して前記2ビットコアセルをプログラムするステップ;を含み、
前記2ビットコアセルをプログラムするステップは、
前記スタティックリファレンスセルの閾値電圧に基づいて前記電流ミラー回路により定電流を生成するステップと、
前記2ビットコアセル及び前記ダイナミックリファレンスセルの間に電流差を与えるために前記定電流を前記ダイナミックリファレンスセルのデータラインに加え、プログラミング動作を確認するステップと、
を含むことを特徴とする方法。 - メモリ装置におけるコアセル領域内の2ビットコアセルをプログラムする装置であって、当該装置は、
前記コアセル領域内にあり前記コアセルと同一のワードラインに接続されたダイナミックリファレンスセルと、
前記コアセル領域外にあるスタティックリファレンスセルと、
前記コアセル領域外にあり前記スタティックリファレンスセルに接続された電流ミラー回路と、を有し、
前記スタティックリファレンスセルに基づいて前記ダイナミックリファレンスセルがプログラムされ、前記ダイナミックリファレンスセルに基づいて前記2ビットコアセルがプログラムされ、
前記2ビットコアセルがプログラムされる際には、
前記スタティックリファレンスセルの閾値電圧に基づいて前記電流ミラー回路により定電流が生成され、
前記2ビットコアセル及び前記ダイナミックリファレンスセルの間に電流差を与えるために前記定電流が前記ダイナミックリファレンスセルのデータラインに加えられ、プログラミング動作が確認される、ことを特徴とする装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/197,116 US6813189B2 (en) | 2002-07-16 | 2002-07-16 | System for using a dynamic reference in a double-bit cell memory |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004039234A JP2004039234A (ja) | 2004-02-05 |
JP2004039234A5 JP2004039234A5 (ja) | 2005-05-26 |
JP4274870B2 true JP4274870B2 (ja) | 2009-06-10 |
Family
ID=30442902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003274071A Expired - Lifetime JP4274870B2 (ja) | 2002-07-16 | 2003-07-14 | 2ビットセルメモリにてダイナミックリファレンスを利用するシステム |
Country Status (2)
Country | Link |
---|---|
US (1) | US6813189B2 (ja) |
JP (1) | JP4274870B2 (ja) |
Families Citing this family (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6768165B1 (en) * | 1997-08-01 | 2004-07-27 | Saifun Semiconductors Ltd. | Two bit non-volatile electrically erasable and programmable semiconductor memory cell utilizing asymmetrical charge trapping |
US7098107B2 (en) * | 2001-11-19 | 2006-08-29 | Saifun Semiconductor Ltd. | Protective layer in memory device and method therefor |
US6700818B2 (en) * | 2002-01-31 | 2004-03-02 | Saifun Semiconductors Ltd. | Method for operating a memory device |
US6917544B2 (en) * | 2002-07-10 | 2005-07-12 | Saifun Semiconductors Ltd. | Multiple use memory chip |
US7136304B2 (en) | 2002-10-29 | 2006-11-14 | Saifun Semiconductor Ltd | Method, system and circuit for programming a non-volatile memory array |
US6967896B2 (en) * | 2003-01-30 | 2005-11-22 | Saifun Semiconductors Ltd | Address scramble |
US7178004B2 (en) * | 2003-01-31 | 2007-02-13 | Yan Polansky | Memory array programming circuit and a method for using the circuit |
US7142464B2 (en) * | 2003-04-29 | 2006-11-28 | Saifun Semiconductors Ltd. | Apparatus and methods for multi-level sensing in a memory array |
US7123532B2 (en) * | 2003-09-16 | 2006-10-17 | Saifun Semiconductors Ltd. | Operating array cells with matched reference cells |
US7652930B2 (en) * | 2004-04-01 | 2010-01-26 | Saifun Semiconductors Ltd. | Method, circuit and system for erasing one or more non-volatile memory cells |
US7755938B2 (en) * | 2004-04-19 | 2010-07-13 | Saifun Semiconductors Ltd. | Method for reading a memory array with neighbor effect cancellation |
CN100555463C (zh) * | 2004-07-30 | 2009-10-28 | 斯班逊有限公司 | 产生感测信号的半导体装置及方法 |
US7095655B2 (en) * | 2004-08-12 | 2006-08-22 | Saifun Semiconductors Ltd. | Dynamic matching of signal path and reference path for sensing |
US20060068551A1 (en) * | 2004-09-27 | 2006-03-30 | Saifun Semiconductors, Ltd. | Method for embedding NROM |
US7638850B2 (en) * | 2004-10-14 | 2009-12-29 | Saifun Semiconductors Ltd. | Non-volatile memory structure and method of fabrication |
US20060146624A1 (en) * | 2004-12-02 | 2006-07-06 | Saifun Semiconductors, Ltd. | Current folding sense amplifier |
US7257025B2 (en) * | 2004-12-09 | 2007-08-14 | Saifun Semiconductors Ltd | Method for reading non-volatile memory cells |
EP1831892A4 (en) * | 2004-12-23 | 2009-06-10 | Atmel Corp | SYSTEM FOR IMPLEMENTING QUICK TEST DURING THE ADJUSTMENT OF FLASH REFERENCE CELLS |
CN1838323A (zh) * | 2005-01-19 | 2006-09-27 | 赛芬半导体有限公司 | 可预防固定模式编程的方法 |
US8053812B2 (en) | 2005-03-17 | 2011-11-08 | Spansion Israel Ltd | Contact in planar NROM technology |
US20070141788A1 (en) * | 2005-05-25 | 2007-06-21 | Ilan Bloom | Method for embedding non-volatile memory with logic circuitry |
US7190621B2 (en) * | 2005-06-03 | 2007-03-13 | Infineon Technologies Ag | Sensing scheme for a non-volatile semiconductor memory cell |
US7259993B2 (en) * | 2005-06-03 | 2007-08-21 | Infineon Technologies Ag | Reference scheme for a non-volatile semiconductor memory device |
US8400841B2 (en) * | 2005-06-15 | 2013-03-19 | Spansion Israel Ltd. | Device to program adjacent storage cells of different NROM cells |
US7184313B2 (en) * | 2005-06-17 | 2007-02-27 | Saifun Semiconductors Ltd. | Method circuit and system for compensating for temperature induced margin loss in non-volatile memory cells |
US7804126B2 (en) * | 2005-07-18 | 2010-09-28 | Saifun Semiconductors Ltd. | Dense non-volatile memory array and method of fabrication |
US20070036007A1 (en) * | 2005-08-09 | 2007-02-15 | Saifun Semiconductors, Ltd. | Sticky bit buffer |
US7668017B2 (en) | 2005-08-17 | 2010-02-23 | Saifun Semiconductors Ltd. | Method of erasing non-volatile memory cells |
US20070096199A1 (en) * | 2005-09-08 | 2007-05-03 | Eli Lusky | Method of manufacturing symmetric arrays |
US20070120180A1 (en) * | 2005-11-25 | 2007-05-31 | Boaz Eitan | Transition areas for dense memory arrays |
US7352627B2 (en) * | 2006-01-03 | 2008-04-01 | Saifon Semiconductors Ltd. | Method, system, and circuit for operating a non-volatile memory array |
US7808818B2 (en) * | 2006-01-12 | 2010-10-05 | Saifun Semiconductors Ltd. | Secondary injection for NROM |
US20070173017A1 (en) * | 2006-01-20 | 2007-07-26 | Saifun Semiconductors, Ltd. | Advanced non-volatile memory array and method of fabrication thereof |
US8253452B2 (en) * | 2006-02-21 | 2012-08-28 | Spansion Israel Ltd | Circuit and method for powering up an integrated circuit and an integrated circuit utilizing same |
US7692961B2 (en) * | 2006-02-21 | 2010-04-06 | Saifun Semiconductors Ltd. | Method, circuit and device for disturb-control of programming nonvolatile memory cells by hot-hole injection (HHI) and by channel hot-electron (CHE) injection |
US7760554B2 (en) * | 2006-02-21 | 2010-07-20 | Saifun Semiconductors Ltd. | NROM non-volatile memory and mode of operation |
US20070255889A1 (en) * | 2006-03-22 | 2007-11-01 | Yoav Yogev | Non-volatile memory device and method of operating the device |
US7701779B2 (en) * | 2006-04-27 | 2010-04-20 | Sajfun Semiconductors Ltd. | Method for programming a reference cell |
US7605579B2 (en) * | 2006-09-18 | 2009-10-20 | Saifun Semiconductors Ltd. | Measuring and controlling current consumption and output current of charge pumps |
JP2008192232A (ja) * | 2007-02-05 | 2008-08-21 | Spansion Llc | 半導体装置およびその制御方法 |
JP2008210467A (ja) * | 2007-02-27 | 2008-09-11 | Nec Electronics Corp | 不揮発性半導体メモリ及びそのテスト方法 |
US20080239599A1 (en) * | 2007-04-01 | 2008-10-02 | Yehuda Yizraeli | Clamping Voltage Events Such As ESD |
US7742340B2 (en) * | 2008-03-14 | 2010-06-22 | Freescale Semiconductor, Inc. | Read reference technique with current degradation protection |
US8045390B2 (en) * | 2008-03-21 | 2011-10-25 | Macronix International Co., Ltd. | Memory system with dynamic reference cell and method of operating the same |
US7940570B2 (en) * | 2009-06-29 | 2011-05-10 | Spansion Llc | Memory employing separate dynamic reference areas |
US9001573B1 (en) * | 2013-12-06 | 2015-04-07 | Micron Technology, Inc. | Method and apparatuses for programming memory cells |
US9589914B2 (en) * | 2014-11-28 | 2017-03-07 | Infineon Technologies Ag | Semiconductor chip |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6373767B1 (en) * | 1999-10-12 | 2002-04-16 | Robert Patti | Memory that stores multiple bits per storage cell |
US6490203B1 (en) * | 2001-05-24 | 2002-12-03 | Edn Silicon Devices, Inc. | Sensing scheme of flash EEPROM |
-
2002
- 2002-07-16 US US10/197,116 patent/US6813189B2/en not_active Expired - Lifetime
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2003
- 2003-07-14 JP JP2003274071A patent/JP4274870B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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US20040012993A1 (en) | 2004-01-22 |
US6813189B2 (en) | 2004-11-02 |
JP2004039234A (ja) | 2004-02-05 |
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