Invention Grant
US07768851B2 Apparatus for implementing SRAM cell write performance evaluation
失效
用于实现SRAM单元写入性能评估的装置
- Patent Title: Apparatus for implementing SRAM cell write performance evaluation
- Patent Title (中): 用于实现SRAM单元写入性能评估的装置
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Application No.: US12351920Application Date: 2009-01-12
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Publication No.: US07768851B2Publication Date: 2010-08-03
- Inventor: Chad Allen Adams , Derick Gardner Behrends , Travis Reynold Hebig , Daniel Mark Nelson
- Applicant: Chad Allen Adams , Derick Gardner Behrends , Travis Reynold Hebig , Daniel Mark Nelson
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Joan Pennington
- Main IPC: G11C7/00
- IPC: G11C7/00

Abstract:
A SRAM cell write performance evaluation circuit includes a SRAM core where each wordline is connected to only one bit column. A ring oscillator circuit is used to generate wordline pulses. A state machine controls operations for the SRAM cell write performance evaluation circuit including the ring oscillator circuit and the SRAM core. A control signal is applied to the state machine to select a first write operation, where the circuit simultaneously writes all the cells to a known state with wide wordlines to ensure all cells are written. Then a second write operation is selected, and all the wordlines are launched simultaneously to write the cells to the opposite state. From these write operations, a required wordline pulse width to write the cell is identified.
Public/Granted literature
- US20090116298A1 APPARATUS FOR IMPLEMENTING SRAM CELL WRITE PERFORMANCE EVALUATION Public/Granted day:2009-05-07
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