Memory Page Buffer
First Claim
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1. A memory method, comprising:
- responsive to a second read instruction to perform a read operation on a second memory cell coupled to a bit line, the second read instruction after a first read instruction to perform the read operation on a first memory cell coupled to the bit line, performing;
applying a read bias arrangement to the second memory cell without discharging the bit line prior to applying the read bias arrangement.
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Abstract
Various embodiments address various difficulties with source side sensing difficulties in various memory architectures, such as 3D vertical gate flash and multilevel cell memory. One such difficulty is that with source side sensing, the signal amplitude is significantly smaller than drain side sensing. Another such difficulty is the noise and reduced sensing margins associated with multilevel cell memory. In some embodiments the bit line is selectively discharged prior to applying the read bias arrangement.
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Citations
22 Claims
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1. A memory method, comprising:
responsive to a second read instruction to perform a read operation on a second memory cell coupled to a bit line, the second read instruction after a first read instruction to perform the read operation on a first memory cell coupled to the bit line, performing; applying a read bias arrangement to the second memory cell without discharging the bit line prior to applying the read bias arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A memory device, comprising:
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a plurality of memory cells including a first memory cell and a second memory cell; a plurality of bit lines coupled to the memory cells, the plurality of bit lines including a bit line coupled to the first memory cell and the second memory cell; and a plurality of source lines coupled to the memory cells, the plurality of source lines including a source line coupled to the second memory cell; and control circuitry responsive to a second read instruction to perform a read operation on the second memory cell after a first read instruction to perform the read operation on the first memory cell, by performing; the control circuitry applying a read bias arrangement to the second memory cell without discharging the bit line prior to applying the read bias arrangement. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of manufacturing a memory device, comprising:
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providing a plurality of memory cells including a memory cell selected for programming; providing a plurality of conductive lines coupled to the memory cells, the plurality of conductive lines including a first conductive line and a second conductive line; and providing a control circuit applying, during a same period of programming the memory cell selected for programming, a first plurality of pulses to the first conductive line and a second plurality of pulses to the second conductive line during a same period, wherein the first plurality of pulses includes multiple pulses having different magnitudes, and the second plurality of pulses includes multiple pulses having different magnitudes.
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21. A page buffer circuit, comprising:
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a differential sense amplifier including a memory element with a previously sensed logic state; and a page buffer logic circuit coupled to the memory element of the differential sense amplifier. - View Dependent Claims (22)
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Specification