Feedback for multi-level signaling in a memory device

    公开(公告)号:US11880591B2

    公开(公告)日:2024-01-23

    申请号:US18056520

    申请日:2022-11-17

    发明人: M. Ataul Karim

    摘要: Methods, systems, and devices for feedback for multi-level signaling in a memory device are described. A receiver may use a modulation scheme to communicate information with a host device. The receiver may include a first circuit, a second circuit, a third circuit, and a fourth circuit. Each of the first circuit, the second circuit, the third circuit, and the fourth circuit may determine, for a respective clock phase, a voltage level of a signal modulated using the modulation scheme. The receiver may include a first feedback circuit, a second feedback circuit, a third feedback circuit, and a fourth feedback circuit. The first feedback circuit that may use information received from the first circuit at the first clock phase and modify the signal input into the second circuit for the second clock phase.

    Current separation for memory sensing

    公开(公告)号:US11670353B2

    公开(公告)日:2023-06-06

    申请号:US17187310

    申请日:2021-02-26

    发明人: Daniele Vimercati

    IPC分类号: G11C11/22 G11C11/56 G11C13/00

    摘要: The present disclosure includes apparatuses, methods, and systems for current separation for memory sensing. An embodiment includes applying a sensing voltage to a memory cell having a ferroelectric material, and determining a data state of the memory cell by separating a first current output by the memory cell while the sensing voltage is being applied to the memory cell and a second current output by the memory cell while the sensing voltage is being applied to the memory cell, wherein the first current output by the memory cell corresponds to a first polarization state of the ferroelectric material of the memory cell and the second current output by the memory cell corresponds a second polarization state of the ferroelectric material of the memory cell.

    Compensating for variations in selector threshold voltages

    公开(公告)号:US09966127B2

    公开(公告)日:2018-05-08

    申请号:US15291711

    申请日:2016-10-12

    IPC分类号: G11C11/22

    摘要: Methods, systems, and devices are described for operating a memory array. A first voltage may be applied to a memory cell to activate a selection component of the memory cell prior to applying a second voltage to the memory cell. The second voltage may be applied to facilitate a sensing operation once the selection component is activated. The first voltage may be applied during a first portion of an access operation and may be used in determining a threshold voltage of the selection component. The subsequently applied second voltage may be applied during a second portion of the access operation and may have a magnitude associated with a preferred voltage for accessing a ferroelectric capacitor of the memory cell. In some cases, the second voltage has a greater rate of increase over time (e.g., a greater “ramp”) than the first voltage.

    CELL-SPECIFIC REFERENCE GENERATION AND SENSING

    公开(公告)号:US20170365322A1

    公开(公告)日:2017-12-21

    申请号:US15692994

    申请日:2017-08-31

    IPC分类号: G11C11/22

    摘要: Methods, systems, and devices for operating a ferroelectric memory cell or cells are described. A portion of charge of a memory cell may be captured and, for example, stored using a capacitor or intrinsic capacitance of the memory array that includes the memory cell. The memory cell may be recharged (e.g., re-written). The memory cell may then be read, and a voltage of the memory cell may be compared to a voltage resulting from the captured charge. A logic state of the memory cell may be determined based at least in part on the voltage comparison.