Novel multi-state memory
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Abstract
Maximized multi-state compaction and more tolerance in memory state behavior is achieved through a flexible, self-consistent and- self-adapting mode of detection, covering a wide dynamic range. For high density multi-state encoding, this approach borders on full analog treatment, dictating analog techniques including A to D type conversion to reconstruct and process the data. In accordance with the teachings of this invention, the memory array is read with high fidelity, not to provide actual final digital data, but rather to provide raw data accurately reflecting the analog storage state, which information is sent to a memory controller for analysis and detection of the actual final digital data.
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Citations
52 Claims
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1-41. -41. (canceled)
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42. A non-volatile memory, comprising:
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a memory array having one or more memory cells each capable of storing N bits of data, where N is grater than or equal to two; and
read circuitry connectable to the memory array, including one or more sense circuits each connectable to one or more of the memory cells, each of the sense circuits including;
a sense amp to determine the response of a corresponding memory cell to a read voltage applied thereto;
voltage application circuitry to apply a plurality of current values for the read voltage to a terminal of the corresponding memory cell, the voltage application circuitry including circuitry to determine the current read voltage value based on output of said sense amp in response to a preceding read voltage value; and
register circuitry to store the response of the corresponding memory cell to at least N of said read voltage values. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification