Static information storage and retrieval – Read/write circuit – Including signal comparison
Reexamination Certificate
2007-09-06
2009-11-24
Ho, Hoai V (Department: 2827)
Static information storage and retrieval
Read/write circuit
Including signal comparison
C365S205000
Reexamination Certificate
active
07623392
ABSTRACT:
A DRAM includes a register storing subsets of row addresses corresponding to rows containing at least one memory cell that is unable to store a data bit during a normal refresh cycle. Each subset includes all but the most significant bit of a corresponding row address. A refresh counter in the DRAM generates refresh row addresses that are used to refresh rows of memory cells. The refresh row addresses are compared to the subsets of row addresses that are stored in the register. In the event of a match, the row of memory cells corresponding to the matching subset of bits is refreshed. The number of refreshes occurring each refresh cycle will depend upon the number of bits in the subset that are omitted from the row address. The memory cells that are unable to retain data bits are identified by a modified sense amplifier.
REFERENCES:
patent: 4334295 (1982-06-01), Nagami
patent: 4433211 (1984-02-01), McCalmont et al.
patent: 4598402 (1986-07-01), Matsumoto et al.
patent: 4706249 (1987-11-01), Nakagawa et al.
patent: 4710934 (1987-12-01), Traynor
patent: 4766573 (1988-08-01), Takemae
patent: 4780875 (1988-10-01), Sakai
patent: 4858236 (1989-08-01), Ogasawara
patent: 4862463 (1989-08-01), Chen
patent: 4918692 (1990-04-01), Hidaka et al.
patent: 4937830 (1990-06-01), Kawashima et al.
patent: 4958325 (1990-09-01), Nakagome et al.
patent: 5056089 (1991-10-01), Furuta et al.
patent: 5127014 (1992-06-01), Raynham
patent: 5172339 (1992-12-01), Noguchi et al.
patent: 5278796 (1994-01-01), Tillinghast et al.
patent: 5291498 (1994-03-01), Jackson et al.
patent: 5307356 (1994-04-01), Fifield
patent: 5313425 (1994-05-01), Lee et al.
patent: 5313464 (1994-05-01), Reiff
patent: 5313475 (1994-05-01), Cromer et al.
patent: 5313624 (1994-05-01), Harriman et al.
patent: 5321661 (1994-06-01), Iwakiri et al.
patent: 5335201 (1994-08-01), Walther et al.
patent: 5369651 (1994-11-01), Marisetty
patent: 5418796 (1995-05-01), Price et al.
patent: 5428630 (1995-06-01), Weng et al.
patent: 5432802 (1995-07-01), Tsuboi
patent: 5446695 (1995-08-01), Douse et al.
patent: 5448578 (1995-09-01), Kim
patent: 5450424 (1995-09-01), Okugaki et al.
patent: 5455801 (1995-10-01), Blodgett et al.
patent: 5459742 (1995-10-01), Cassidy et al.
patent: 5481552 (1996-01-01), Aldereguia et al.
patent: 5509132 (1996-04-01), Matsuda et al.
patent: 5513135 (1996-04-01), Dell et al.
patent: 5515333 (1996-05-01), Fujita et al.
patent: 5588112 (1996-12-01), Dearth et al.
patent: 5600662 (1997-02-01), Zook
patent: 5604703 (1997-02-01), Nagashima
patent: 5623506 (1997-04-01), Dell et al.
patent: 5629898 (1997-05-01), Idei et al.
patent: 5631914 (1997-05-01), Kashida et al.
patent: 5703823 (1997-12-01), Douse et al.
patent: 5706225 (1998-01-01), Buchenrieder et al.
patent: 5712861 (1998-01-01), Inoue et al.
patent: 5732092 (1998-03-01), Shinohara
patent: 5740188 (1998-04-01), Olarig
patent: 5754753 (1998-05-01), Smelser
patent: 5761222 (1998-06-01), Baldi
patent: 5765185 (1998-06-01), Lambrache et al.
patent: 5784328 (1998-07-01), Irrinki et al.
patent: 5784391 (1998-07-01), Konigsburg
patent: 5808952 (1998-09-01), Fung et al.
patent: 5841418 (1998-11-01), Bril et al.
patent: 5864569 (1999-01-01), Roohparvar
patent: 5878059 (1999-03-01), Maclellan
patent: 5896404 (1999-04-01), Kellogg et al.
patent: 5912906 (1999-06-01), Wu et al.
patent: 5953278 (1999-09-01), McAdams et al.
patent: 5961660 (1999-10-01), Capps, Jr. et al.
patent: 5963103 (1999-10-01), Blodgett
patent: 6009547 (1999-12-01), Jaquette et al.
patent: 6009548 (1999-12-01), Chen et al.
patent: 6018817 (2000-01-01), Chen et al.
patent: 6041001 (2000-03-01), Estakhri
patent: 6041430 (2000-03-01), Yamauchi
patent: 6085283 (2000-07-01), Toda
patent: 6085334 (2000-07-01), Giles et al.
patent: 6092231 (2000-07-01), Sze
patent: 6101614 (2000-08-01), Gonzales et al.
patent: 6125467 (2000-09-01), Dixon
patent: 6134167 (2000-10-01), Atkinson
patent: 6137739 (2000-10-01), Kim
patent: 6178537 (2001-01-01), Roohparvar
patent: 6199139 (2001-03-01), Katayama et al.
patent: 6212118 (2001-04-01), Fujita
patent: 6212631 (2001-04-01), Springer et al.
patent: 6216246 (2001-04-01), Shau
patent: 6216247 (2001-04-01), Creta et al.
patent: 6219807 (2001-04-01), Ebihara et al.
patent: 6223309 (2001-04-01), Dixon et al.
patent: 6233717 (2001-05-01), Choi
patent: 6262925 (2001-07-01), Yamasaki
patent: 6279072 (2001-08-01), Williams et al.
patent: 6310825 (2001-10-01), Furuyama
patent: 6324119 (2001-11-01), Kim
patent: 6349068 (2002-02-01), Takemae et al.
patent: 6349390 (2002-02-01), Dell et al.
patent: 6353910 (2002-03-01), Carnevale et al.
patent: 6397290 (2002-05-01), Williams et al.
patent: 6397357 (2002-05-01), Cooper
patent: 6397365 (2002-05-01), Brewer et al.
patent: 6438066 (2002-08-01), Ooishi et al.
patent: 6442644 (2002-08-01), Gustavson et al.
patent: 6457153 (2002-09-01), Yamamoto et al.
patent: 6484246 (2002-11-01), Tsuchida et al.
patent: 6510537 (2003-01-01), Lee
patent: 6526537 (2003-02-01), Kishino
patent: 6549460 (2003-04-01), Nozoe et al.
patent: 6556497 (2003-04-01), Cowles et al.
patent: 6557072 (2003-04-01), Osborn
patent: 6560155 (2003-05-01), Hush
patent: 6584543 (2003-06-01), Williams et al.
patent: 6591394 (2003-07-01), Lee et al.
patent: 6594796 (2003-07-01), Chiang
patent: 6601211 (2003-07-01), Norman
patent: 6603694 (2003-08-01), Frankowsky et al.
patent: 6609236 (2003-08-01), Watanabe et al.
patent: 6614698 (2003-09-01), Ryan et al.
patent: 6618281 (2003-09-01), Gordon
patent: 6618319 (2003-09-01), Ooishi et al.
patent: 6628558 (2003-09-01), Fiscus
patent: 6636444 (2003-10-01), Uchida et al.
patent: 6636446 (2003-10-01), Lee et al.
patent: 6646942 (2003-11-01), Janzen
patent: 6662333 (2003-12-01), Zhang et al.
patent: 6665231 (2003-12-01), Mizuno et al.
patent: 6678860 (2004-01-01), Lee
patent: 6697926 (2004-02-01), Johnson et al.
patent: 6697992 (2004-02-01), Ito et al.
patent: 6701480 (2004-03-01), Karpuszka et al.
patent: 6704230 (2004-03-01), DeBrosse et al.
patent: 6715104 (2004-03-01), Imbert de Tremiolles et al.
patent: 6715116 (2004-03-01), Lester et al.
patent: 6735726 (2004-05-01), Muranaka et al.
patent: 6751143 (2004-06-01), Morgan et al.
patent: 6754858 (2004-06-01), Borkenhagen et al.
patent: 6775190 (2004-08-01), Setogawa
patent: 6778457 (2004-08-01), Burgan
patent: 6781908 (2004-08-01), Pelley et al.
patent: 6788616 (2004-09-01), Takahashi
patent: 6789209 (2004-09-01), Suzuki et al.
patent: 6792567 (2004-09-01), Laurent
patent: 6795362 (2004-09-01), Nakai et al.
patent: 6807108 (2004-10-01), Maruyama et al.
patent: 6810449 (2004-10-01), Barth et al.
patent: 6819624 (2004-11-01), Acharya et al.
patent: 6834022 (2004-12-01), Derner et al.
patent: 6934199 (2005-08-01), Johnson et al.
patent: 6940773 (2005-09-01), Poechmueller
patent: 6965537 (2005-11-01), Klein et al.
patent: 7027337 (2006-04-01), Johnson et al.
patent: 7095669 (2006-08-01), Oh
patent: 7096407 (2006-08-01), Olarig
patent: 7099221 (2006-08-01), Klein
patent: 7116602 (2006-10-01), Klein
patent: 7117420 (2006-10-01), Yeung et al.
patent: 7149141 (2006-12-01), Johnson et al.
patent: 7171605 (2007-01-01), White
patent: 7184352 (2007-02-01), Klein et al.
patent: 7254067 (2007-08-01), Johnson et al.
patent: 2001/0023496 (2001-09-01), Yamamoto et al.
patent: 2001/0029592 (2001-10-01), Walker et al.
patent: 2001/0044917 (2001-11-01), Lester et al.
patent: 2001/0052090 (2001-12-01), Mio
patent: 2001/0052102 (2001-12-01), Roohparvar
patent: 2002/0013924 (2002-01-01), Yamasoto
patent: 2002/0029316 (2002-03-01), Williams et al.
patent: 2002/0144210 (2002-10-01), Borkenhagen et al.
patent: 2002/0152444 (2002-10-01), Chen et al.
patent: 2002/0162069 (2002-10-01), Laurent
patent: 2002/0184592 (2002-12-01), Koga et al.
patent: 2003/0009721 (2003-01-01), Hsu et al.
patent: 2003/0070054 (2003-04-01), Williams et al.
patent: 2003/0093744 (2003-05-01), Leung et al.
patent: 2003/0097608 (2003-05-01), Rodeheffer et al.
patent: 2003/0101405 (2003-05-01), Shibata
patent: 2003/0149855 (2003-08-01), Shibata et al.
patent: 2003/0167437 (2003-09-01), DeSota et al.
patent: 2003/0191888 (2003-10-01), Klein
patent: 2004/0
Dorsey & Whitney LLP
Ho Hoai V
Micro)n Technology, Inc.
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