- 专利标题: Compute-in-memory (CIM) employing low-power CIM circuits employing static random access memory (SRAM) bit cells, particularly for multiply-and-accumluate (MAC) operations
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申请号: US17084779申请日: 2020-10-30
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公开(公告)号: US11176991B1公开(公告)日: 2021-11-16
- 发明人: Khaja Ahmad Shaik , Bharani Chava , Dawuth Shadulkhan Pathan
- 申请人: QUALCOMM Incorporated
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM Incorporated
- 当前专利权人: QUALCOMM Incorporated
- 当前专利权人地址: US CA San Diego
- 代理机构: Qualcomm Incorporated
- 主分类号: G11C7/00
- IPC分类号: G11C7/00 ; G11C11/4094 ; G11C11/4096 ; G11C5/06 ; G11C11/4074 ; G11C11/404
摘要:
Low-power compute-in-memory (CIM) systems employing CIM circuits that include static random access memory (SRAM) bit cells circuits. The CIM circuits can be used for multiply-and-accumulate (MAC) operations. The CIM circuits can include five-transistor (5T) SRAM bit cells that each have a single bit line coupled to an access circuit for accessing the SRAM bit cell for read/write operations. The CIM circuit also includes a multiplication circuit (e.g., an exclusive OR (XOR)-based circuit) coupled to the SRAM bit cell. The CIM circuit is configured to perform multiplication of an input data value received by the multiplication circuit with a weight data value stored in the SRAM bit cell. The reduction of an access circuit in the 5T SRAM bit cell allows the pull-up voltage at a supply voltage rail coupled to the inverters of the 5T SRAM bit cell to be reduced to reduce standby power while providing storage stability.
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