Invention Grant
- Patent Title: Phase change based memory device and method for operating same
- Patent Title (中): 基于相变的存储器件及其操作方法
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Application No.: US10695238Application Date: 2003-10-27
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Publication No.: US06985389B2Publication Date: 2006-01-10
- Inventor: Herman Ma
- Applicant: Herman Ma
- Applicant Address: US TX Carrollton
- Assignee: STMicroelectronics, Inc.
- Current Assignee: STMicroelectronics, Inc.
- Current Assignee Address: US TX Carrollton
- Agent Lisa K. Jorgenson; Andre M. Szuwalski
- Main IPC: G11C7/00
- IPC: G11C7/00

Abstract:
A circuit and method are disclosed for a memory device, such as a phase change memory. Specifically, there is disclosed a memory having a plurality of columns of memory cells, with each column of memory cells being coupled to a bit or data line. Each memory cell includes a programmable resistive element coupled in series with a select transistor. Each bit line is coupled to a distinct reference cell and a distinct transistor. The transistor is coupled between the corresponding bit line and a reference voltage, such as ground. During a memory read operation, the transistor, reference cell and addressed memory cell form a differential amplifier circuit. The output of the differential amplifier circuit is coupled to the data output terminals of the phase change memory.
Public/Granted literature
- US20050088872A1 Phase change based memory device and method for operating same Public/Granted day:2005-04-28
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