Invention Grant
- Patent Title: Current steering in reading magnetic tunnel junction
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Application No.: US17703869Application Date: 2022-03-24
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Publication No.: US11676648B2Publication Date: 2023-06-13
- Inventor: Gaurav Gupta , Zhiqiang Wu , Yih Wang
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Seed IP Law Group LLP
- Main IPC: G11C11/16
- IPC: G11C11/16

Abstract:
The disclosed MTJ read circuits include a current steering element coupled to the read path. At a first node of the current steering element, a proportionally larger current is maintained to meet the requirements of a reliable voltage or current sensing. At a second node of the current steering element, a proportionally smaller current is maintained, which passes through the MTJ structure. The current at the first node is proportional to the current at the second node such that sensing the current at the first node infers the current at the second node, which is affected by the MTJ resistance value.
Public/Granted literature
- US20220215869A1 CURRENT STEERING IN READING MAGNETIC TUNNEL JUNCTION Public/Granted day:2022-07-07
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