Invention Grant
- Patent Title: Virtual ground sensing circuitry and related devices, systems, and methods for crosspoint ferroelectric memory
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Application No.: US16184688Application Date: 2018-11-08
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Publication No.: US10541015B2Publication Date: 2020-01-21
- Inventor: Giulio Giuseppe Marotta , Marco Domenico Tiburzi
- Applicant: Micron Technology, Inc.
- Applicant Address: US ID Boise
- Assignee: Micron Technology, Inc.
- Current Assignee: Micron Technology, Inc.
- Current Assignee Address: US ID Boise
- Agency: TraskBritt
- Main IPC: G11C11/22
- IPC: G11C11/22 ; G11C11/56 ; G11C7/06

Abstract:
A virtual ground sensing circuit includes a sense circuit configured to compare a reference voltage potential to a sense node voltage potential, and virtual ground circuitry operably coupled to the sense circuit. The virtual ground circuitry is configured to provide a virtual ground at a first bias voltage potential to a conductive line operably coupled to a selected ferroelectric memory cell, and discharge the conductive line to the sense node responsive to the selected ferroelectric memory cell changing from a first polarization state to a second polarization state. A method includes applying a second bias voltage potential to another conductive line operably coupled to the selected ferroelectric memory cell, and comparing a sense node voltage potential to a reference voltage potential. Electrical systems and computing devices include virtual ground sensing circuits.
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