发明名称 |
TECHNIQUES TO IDENTIFY A PROCESS CORNER |
摘要 |
Methods and apparatus for identifying a process corner are provided. Provided is an exemplary method for identifying a process corner of an integrated circuit (IC). The IC has a first asymmetrical ring oscillator (ARO1) including pull-up transistors that have a low threshold voltage (LVT) and pull-down transistors that have a regular threshold voltage (RVT), and has a second asymmetrical ring oscillator (ARO2) including pull-up transistors that have an RVT and pull-down transistors having an LVT. The exemplary method includes applying an ultra-low power supply voltage to the ARO1 and the ARO2 that causes the integrated circuit to operate near a verge of malfunction, measuring an output frequency of the ARO1, measuring an output frequency of the ARO2, calculating a calculated ratio of the output frequency of the ARO1 and the output frequency of the ARO2, and comparing the calculated ratio to a fiduciary ratio to identify the process corner. |
申请公布号 |
WO2017053006(A1) |
申请公布日期 |
2017.03.30 |
申请号 |
WO2016US49028 |
申请日期 |
2016.08.26 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
PU, Yu;SAMSON, Giby;YUEN, Kendrick Hoy Leong |
分类号 |
G01R31/28;G01R31/30;H01L21/66 |
主分类号 |
G01R31/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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