Storage devices with soft processing
AssigneeLyric Semiconductor, Inc.
InventorsBenjamin Vigoda, Jeffrey Bernstein, Jeffrey Venuti, David Reynolds, Alexander Alexeyev
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Abstract
A storage device includes a storage array having a group of storage elements. Each storage element can written to a discrete set of physical states. A read circuit selects one or more storage elements and generates, for each selected storage element, an analog signal representative of the physical state of the selected storage element. A signal processing circuit processes the analog signal to generate a plurality of outputs, with each output representing a degree of an association of the selected storage element with a different subset of one or more of the discrete set of physical states.
Claims18
A circuit comprising:
- a signal processing circuit for accepting a discrete-valued input characterizing an observation of a signal and for generating a set of continuous-valued outputs, each output characterizing a corresponding log likelihood ratio (LLR) based measure of an association of the signal with one or more of a set of representative levels, the signal processing circuit including:
- a plurality of mapping circuits, each configured to map a different range of the discrete-valued input to a respective discrete-valued output signal according to a modeling of the characteristics of the observation of the signal;
- and
- a plurality of conversion circuits each configured for accepting the discrete-valued output signal of a corresponding mapping circuit to generate a respective one of the set of continuous-valued output.
Dependencies are inferred from the claim text.