MULTIPLE CONCURRENT MODULATION SCHEMES IN A MEMORY SYSTEM
First Claim
1. An apparatus, comprising:
- a memory controller configured to communicate using a first signal type modulated using a first modulation scheme having at least three levels, and a second signal type modulated using a second modulation scheme having two levels;
a first memory die including a plurality of memory cells;
a first signal path coupled with the memory controller and the first memory die, the first signal path configured for the first signal type; and
a second signal path coupled with the memory controller and the first memory die, the second signal path configured for the second signal type.
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Abstract
Methods, systems, and devices for multiple concurrent modulation schemes in a memory system are described. Techniques are provided herein to communicate data using a modulation scheme having at least three levels and using a modulation scheme having at least two levels within a common system or memory device. Such communication with multiple modulation schemes may be concurrent. The modulated data may be communicated to a memory die through distinct signal paths that may correspond to a particular modulation scheme. An example of a modulation scheme having at least three levels may be pulse amplitude modulation (PAM) and an example of a modulation scheme having at least two levels may be non-return-to-zero (NRZ).
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Citations
25 Claims
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1. An apparatus, comprising:
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a memory controller configured to communicate using a first signal type modulated using a first modulation scheme having at least three levels, and a second signal type modulated using a second modulation scheme having two levels; a first memory die including a plurality of memory cells; a first signal path coupled with the memory controller and the first memory die, the first signal path configured for the first signal type; and a second signal path coupled with the memory controller and the first memory die, the second signal path configured for the second signal type. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
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identifying first data to be communicated to a first memory die; determining, from a plurality of modulation schemes, a first modulation scheme for the first data; selecting a first signal path for communicating the first data based at least in part on determining the first modulation scheme from the plurality of modulation schemes; and communicating a first signal modulated using the first modulation scheme to the first memory die using the first signal path. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus, comprising:
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a first memory die including a plurality of memory cells; a first signal path coupled with the first memory die; a memory controller coupled with the first memory die and the first signal path, the memory controller operable to; identify first data to be communicated to the first memory die; determine, from a plurality of modulation schemes, a first modulation scheme for the first data; select the first signal path for the first data based at least in part on determining the first modulation scheme from the plurality of modulation schemes; and communicate a first signal modulated using the first modulation scheme to the first memory die using the first signal path. - View Dependent Claims (19, 20, 21)
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22. An apparatus, comprising:
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a memory controller configured to communicate using a first signal type modulated using a first modulation scheme having at least three levels, and a second signal type modulated using a second modulation scheme having two levels; a first memory die including a plurality of memory cells; a second memory die including a plurality of memory cells; a first signal path coupled with the memory controller and the first memory die, the first signal path configured for the first signal type; and a second signal path coupled with the memory controller and the second memory die, the second signal path configured for the second signal type. - View Dependent Claims (23, 24, 25)
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Specification