US5329479A
Expired / Lapsed
US
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Dynamic semiconductor memories
Assignee: Sharp Corp
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Filing: 1988-02-08
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Granted: 1994-07-12
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Expires: 2008-02-08
Abstract
Abstract A dynamic semiconductor memory includes a pair of complementary bit lines with a significant difference in load capacitance, storage capacitors and a pair of transistors for specifying one of the storage capacitors. One end of each storage capacitor is connected to one of the bit lines through one of the transistors and the other end is connected to the other bit line through the other transistor.
Inventors
- 👤 Yoshiji Ota
- 👤 Toshio Mimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:47
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/403; G11C11/404
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
A dynamic semiconductor memory with memory cell structure comprising a first bit line with load capacitance C 1 and a second bit line with load capacitance C 2 for inputting and outputting information, said bit lines being complementary to each other, storage capacitor means for storing information, said storage capacitor having capacitance C S , and a first selection means and a second selection means for specifying said storage capacitor means, one end of said storage capacitor means being connected to said first bit line through said first selection means and the other end of said storage capacitor means being connected to said second bit line through said second selection means, wherein C 1 and C 2 are significantly different from each other, and the voltages of said first and second bit lines depend on C 1 , C 2 and C S .
Claim 2
Dependent Claim
144 words
A dynamic semiconductor memory with memory cell structure comprising a first bit line with load capacitance C 1 and a second bit line with load capacitance C 2 for inputting and outputting information, said bit lines being complementary to each other, storage capacitor means for storing information, said storage capacitor having capacitance C S , and a first selection means and a second selection means for specifying said storage capacitor means, one end of said storage capacitor means being connected to said first bit line through said first selection means and the other end of said storage capacitor means being connected to said second bit line through said second selection means, wherein C 1 and C 2 are significantly different from each other, and the voltages of said first and second bit lines depend on C 1 , C 2 and C S .
Claim 3
Dependent Claim
24 words
The dynamic semiconductor memory of claim 1 wherein the quotient C 1 /(C 1 +C 2 ) is nearly equal to 0 or 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |