Invention Grant
- Patent Title: Method and apparatus for reading a magnetic tunnel junction using a sequence of short pulses
- Patent Title (中): 使用短脉冲序列读取磁性隧道结的方法和装置
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Application No.: US13688066Application Date: 2012-11-28
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Publication No.: US08693240B1Publication Date: 2014-04-08
- Inventor: Ebrahim Abedifard , Parviz Keshtbod
- Applicant: Avalanche Technology, Inc.
- Applicant Address: US CA Fremont
- Assignee: Avalanche Technology, Inc.
- Current Assignee: Avalanche Technology, Inc.
- Current Assignee Address: US CA Fremont
- Agency: IPxLAW Group LLP
- Agent Maryam Imam
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
A magnetic random access memory (MRAM) array having a magnetic tunnel junction (MTJ) to be read using a magnetic state of the MTJ, the MTJ being read by applying a current therethrough. Further, the MRAM array has a reference MTJ, a sense amplifier coupled to the MTJ and the reference MTJ, the sense amplifier operable to compare the voltage of the MTJ to the reference MTJ in determining the state of the MTJ; a first capacitor coupled to the sense amplifier at a first end and to ground at a second end; and a second capacitor coupled to the sense amplifier at a first end and to ground at a second end, the first capacitor storing the, wherein short voltage pulses are applied to the first end of each of the first and second capacitors when reading the MTJ thereby makes the current flowing through the MTJ therethrough for small time intervals thereby avoiding read disturbance to the MTJ.
Information query