Intelligent refreshing method and apparatus for increasing multi

Details Intelligent refreshing method and apparatus for increasing multi Intelligent refreshing method and apparatus for increasing multi

1998-10-08

2000-01-25

Hoang, Huan

Static information storage and retrieval

Floating gate

Particular biasing

36518503, 36518521, G11C 1606

Patent

active

060184779

ABSTRACT:
An intelligent refreshing method and apparatus for increasing multi-level non-volatile memory charge retention reliability is described. In one embodiment, the apparatus comprises a circuit that is coupled to a multi-level memory cell and a sensing circuit. The sensing circuit senses a voltage of the memory cell and provides a digital value in response thereto. The circuit includes a selection circuit that receives the digital value and at least one trigger voltage, and provides an output trigger voltage responsive to the digital value. The circuit further includes a comparator having a first terminal coupled to receive the output trigger voltage, a second terminal coupled to receive the memory cell voltage, and an output terminal.

REFERENCES:
patent: 5594691 (1997-01-01), Bashir
patent: 5894436 (1999-04-01), Ohkawa et al.

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