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

Magneto-resistive memory having sense amplifier with offset control

Patent 6396733 Issued on May 28, 2002. Estimated Expiration Date: Icon_subject July 17, 2020. 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

3573485

Volatile/non-volatile logic latch circuit
Patent #: 4132904
Issued on: 01/02/1979
Inventor: Harari

Sense amplifier
Patent #: 4553053
Issued on: 11/12/1985
Inventor: Ong ,   et al.

Magnetoresistive memory including thin film storage cells having tapered ends
Patent #: 4731757
Issued on: 03/15/1988
Inventor: Daughton ,   et al.

Differential arrangement magnetic memory cell
Patent #: 4751677
Issued on: 06/14/1988
Inventor: Daughton ,   et al.

Differential magnetoresistive memory sensing
Patent #: 4829476
Issued on: 05/09/1989
Inventor: Dupuis ,   et al.

Non-volatile, radiation-hard, random-access memory
Patent #: 4887236
Issued on: 12/12/1989
Inventor: Schloemann

5237533

Sense circuit for storage devices such as non-volatile memories, with compensated offset current
Patent #: 5276644
Issued on: 01/04/1994
Inventor: Pascucci, et al.

Sense amplifier input stage for single array memory
Patent #: 5349302
Issued on: 09/20/1994
Inventor: Cooper

More ...

Inventors

Application

No. 618256 filed on 07/17/2000

US Classes:

365/158, Magnetoresistive365/207Differential sensing

Examiners

Primary: Nguyen, Tan T.

Attorney, Agent or Firm

Foreign Patent References

  • 0 776 011 EP. 05/13/1997
  • WO 98/20496 WO. 05/13/1998

International Class

G11C 011/00

Abstract

A magneto-resistive memory is disclosed that includes a high-speed sense amplifier that can reliably operate at low signal levels. The sense amplifier includes offset cancellation to reduce or eliminate the internal offsets of the amplifier. The offset cancellation is controlled by one or more switches, which during operation, selectively enable the offset cancellation of the amplifier and store the offsets in one or more coupling capacitors.

Other References

  • B Razavi and B.A. Wooley, "Design techniques for High Speed, High Resolution Comparators", IEEE Journal of Solid State Circuits, vol. 27, pp. 1916-1926, Dec. 199
PatentsPlus Images
Enhanced PDF formats
loading...
PatentsPlus: add to cart
PatentsPlus: add to cartSearch-enhanced full patent PDF image
$9.95more info
PatentsPlus: add to cart
PatentsPlus: add to cartIntelligent turbocharged patent PDFs with marked up images
$16.95more info
 
Sign InRegister
Username  
Password   
forgot password?