U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Bit-line isolated, CMOS sense amplifier

Patent 4804871 Issued on February 14, 1989. Estimated Expiration Date: Icon_subject July 28, 2007. 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

Monolithically integrated semiconductor memory
Patent #: 4441171
Issued on: 04/03/1984
Inventor: Hoffmann

Sense amplifier
Patent #: 4551641
Issued on: 11/05/1985
Inventor: Pelley, III

Semiconductor memory device having active pull-up circuits
Patent #: 4601017
Issued on: 07/15/1986
Inventor: Mochizuki ,   et al.

Sense amplifier for CMOS semiconductor memory devices having symmetrically balanced layout
Patent #: 4634901
Issued on: 01/06/1987
Inventor: McElroy

ECL to FET interface circuit for field effect transistor arrays
Patent #: 4645954
Issued on: 02/24/1987
Inventor: Schuster

Midpoint sense amplification scheme for a CMOS DRAM
Patent #: 4694205
Issued on: 09/15/1987
Inventor: Shu ,   et al.

CMOS sense amplifier with isolated sensing nodes Patent #: 4716320
Issued on: 12/29/1987
Inventor: McAdams

Inventor

Assignee

Application

No. 07/078746 filed on 07/28/1987

US Classes:

327/54, Having feedback327/57, With latching type element (e.g., flip-flop, etc.)365/190, For complementary information365/203, Precharge365/205Flip-flop used for sensing

Examiners

Primary: Hudspeth, David

Attorney, Agent or Firm

International Classes

G11C 7/00 (20060101)
G11C 7/06 (20060101)
G11C 7/12 (20060101)

Abstract

A sense amplifier includes a pair of decoupling transistors (P4, P5) for isolating the sense nodes (X, Y) from the bit lines (B, B) during the assertion of a sense signal, thereby eliminating the occurrence of current spikes and increasing its gain.

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