U.S. patents available from 1976 to present.
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Dynamic random access memory having folded bit line-shared sense amplifiers

Patent 4916667 Issued on April 10, 1990. Estimated Expiration Date: Icon_subject December 20, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Memory device
Patent #: 4366559
Issued on: 12/28/1982
Inventor: Misaizu ,   et al.

Dynamic semiconductor memory device with balanced sensing arrangement
Patent #: 4545037
Issued on: 10/01/1985
Inventor: Nakano ,   et al.

Semiconductor memory device
Patent #: 4546457
Issued on: 10/08/1985
Inventor: Nozaki ,   et al.

Dynamic memory device
Patent #: 4606010
Issued on: 08/12/1986
Inventor: Saito

Dynamic RAM with active pull-up circuit
Patent #: 4736343
Issued on: 04/05/1988
Inventor: Hidaka ,   et al.

Dynamic ram having folded bit line structure
Patent #: 4739500
Issued on: 04/19/1988
Inventor: Miyamoto ,   et al.

Semiconductor memory having divided bit lines and individual sense amplifiers Patent #: 4803663
Issued on: 02/07/1989
Inventor: Miyamoto ,   et al.

Inventors

Assignee

Application

No. 287447 filed on 12/20/1988

US Classes:

365/207, Differential sensing365/189.04, Simultaneous operations (e.g., read/write)365/203, Precharge365/210, Reference or dummy element365/230.01ADDRESSING

Examiners

Primary: Fears, Terrell W.

Attorney, Agent or Firm

International Class

G11C 013/00

Foreign Application Priority Data

1987-12-25 JP

Abstract

A folded line DRAM having shared sense amplifiers wherein one of two the memory cell arrays is provided with a pair of switches for dividing the bit line pairs into plural bit line pair groups and the second memory cell array is provided with separate switches connected in series the bit line pairs for the purpose of reducing power consumption caused by charging and discharging of the bit lines during accessing.

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