Randomly writable memory device and method of operating thereof
AssigneeSanDisk Technologies LLC
InventorsChristopher Petti, Srikanth Ranganathan
Life of this patent
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Abstract
A method of writing data to a DNA strand comprises cutting an address block of a selected address-data block unit of the DNA strand to form first and second DNA strings, and inserting a replacement address-data block that includes a replacement data segment between the first DNA string and the second DNA string to provide a rewritten DNA strand having valid address followed by valid data and an invalid address followed by invalid data.
Claims6
A DNA strand memory device comprising a DNA strand comprising a sequence of address-data block units that are connected among one another, each of the address-data block units including a respective protospacer adjacent motif (PAM), a respective first DNA sequence that functions as a respective address block that encodes an address of the respective address-data block unit, and a respective second DNA sequence that functions as a respective data segment that includes stored data, wherein at least one of the address-data block units further comprises a third DNA sequence that functions as an invalid address block that is attached to the respective second DNA sequence, and further includes a fourth DNA sequence that is attached to the third DNA sequence and functions as an invalid data segment, wherein:
- only one PAM is provided for each of the address-data block units;
- each of the address-data block units begins with the respective PAM;
- and
- the invalid address block comprises a partial address, an invalidation indicator or DNA that violates a parity check rule.
Dependencies are inferred from the claim text.