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US5644543A Expired / Lapsed US ⏱️ 0.0 years remaining

Semiconductor memory apparatus having sense amplifiers connected to both ends of a pair of bit lines

Assignee: SK Hynix Inc
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Filing: 1996-01-16
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Granted: 1997-07-01
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Expires: 2016-01-16
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Abstract

Abstract An improved memory driving method for a semiconductor memory apparatus capable of achieving a series of data accesses by connecting two sense amplifying units to a pair of bit lines, which includes the steps of a first step which senses a data of a memory cell selected by a word line driver and stores the thusly sensed data into a first sense amplifying unit in accordance with a switching operation of a first switch; a second step which selects another memory cell during a sensing operation of the first sense amplifying unit and stores a data of the memory cell into a second sense amplifying unit in accordance with a switching operation of a second switch; and a third step which records data stored in the first sense amplifying unit and second sense amplifying unit into selected memory cells, respectively, in accordance with a certain line and a switch signal, so that data access time of the system can be advantageously reduced.

Inventors

  • 👤 Tae Hyoung Kim
  • 👤 Jin Hong Ahn

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 18:20
CPC Classifications
G; G11; G11C; G11C8/00; G11C8/08; G11C7/00; G11C7/06; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/4063; G11C11/407; G11C11/409; G11C11/4091; G11C7/10; G11C7/1015

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 190 words
A memory driving method for a semiconductor memory apparatus wherein first and second sense amplifying units are connected to a pair of bit lines of a memory array, respectively, through first and second switches, and a latch type word line driver capable of concurrently selecting at least two memory cells connected to one bit line is provided in said semiconductor memory apparatus, comprising the steps of: a first step which senses a data of a first memory cell selected by said word line driver and stores the thusly sensed data into said first sense amplifying unit in accordance with a switching operation of a first switch; a second step which selects a second memory cell during the sensing operation of said first sense amplifying unit and stores a data of said second memory cell into said second sense amplifying unit in accordance with a switching operation of a second switch; and a third step which restores data stored in the first sense amplifying unit and second sense amplifying unit into said first and second selected memory cells, respectively, in accordance with said switching operation of said first and second switches.
Claim 2
Dependent Claim 190 words
A memory driving method for a semiconductor memory apparatus wherein first and second sense amplifying units are connected to a pair of bit lines of a memory array, respectively, through first and second switches, and a latch type word line driver capable of concurrently selecting at least two memory cells connected to one bit line is provided in said semiconductor memory apparatus, comprising the steps of: a first step which senses a data of a first memory cell selected by said word line driver and stores the thusly sensed data into said first sense amplifying unit in accordance with a switching operation of a first switch; a second step which selects a second memory cell during the sensing operation of said first sense amplifying unit and stores a data of said second memory cell into said second sense amplifying unit in accordance with a switching operation of a second switch; and a third step which restores data stored in the first sense amplifying unit and second sense amplifying unit into said first and second selected memory cells, respectively, in accordance with said switching operation of said first and second switches.
Claim 3
Dependent Claim 40 words
The method of claim 1, wherein said first and second switches of said first and second steps are turned on before a word line is enabled, and the first switch is turned off before the second switch is turned on.
Claim 4
Dependent Claim 34 words
The method of claim 1, wherein said first and second switches of said third step are turned on before a word line is enabled, and are turned off after said word line is disabled.

References Cited (Backward Citations)

US4811302A Cited
US5307314A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2000-06-30 2000-12-30 2001-07-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2004-06-30 2004-12-30 2005-07-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2008-06-30 2008-12-30 2009-07-01 $7700.00 Window Closed / Lapsed

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