一种基于自旋转移矩磁性随机存储器的无参考单端读电路

By designing a referenceless single-ended read circuit and using bit line voltage division to generate current signals for data reading, the problems of complexity and high power consumption of traditional STT-MRAM read circuits are solved, achieving low-power, high-speed and high-integration data reading.

CN120431978BActive Publication Date: 2026-07-17SOUTHEAST UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHEAST UNIV
Filing Date
2025-04-30
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional STT-MRAM dual-ended read circuits require reference signals or complex circuit structures, which increases circuit complexity and power consumption, making it difficult to meet the requirements of high integration and high-speed read/write.

Method used

Design a referenceless single-ended read circuit based on a spin-torque magnetic random access memory, including a bit line voltage divider generation circuit, a voltage-current sensing circuit, and a current-voltage latch circuit. Data is read by generating a current signal through bit line voltage divider, reducing the dependence on reference cells.

Benefits of technology

It achieves low-power, high-speed, and highly integrated data reading, reduces circuit complexity, and improves reading speed and data stability.

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Abstract

本发明公开了一种基于自旋转移矩磁性随机存储器的无参考单端读电路,该电路包括位线分压产生电路、电压‑电流感知电路、以及电流‑电压锁存电路。存储单元由一个磁隧道结和一个访存晶体管构成,该电路在读取时不需要参考单元,在锁存电路预存数据,根据磁隧道结的不同阻值状态在位线上产生不同的分压,将位线分压转换为电流镜输入电流,电流镜输出电流大小决定锁存电路锁存状态保持或翻转,从而完成对存储单元存储数据的读取。该电路可以在低电压和高频率下实现数据读取,电流模式显著降低功耗,提升读取速度并提高集成度。
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