An accelerated evaluation method for the SRAM cell write margin is proposed using the conventional Write Noise Margin (WNM) definition based on the “butterfly curve”. The WNM is measured under a lower word line volt...An accelerated evaluation method for the SRAM cell write margin is proposed using the conventional Write Noise Margin (WNM) definition based on the “butterfly curve”. The WNM is measured under a lower word line voltage than the power supply voltage VDD. A lower word line voltage is chosen in order to make the access transistor operate in the saturation mode over a wide range of threshold voltage variation. The final WNM at the VDD word line voltage, the Accelerated Write Noise Margin (AWNM), is obtained by shifting the measured WNM at the lower word line voltage. The WNM shift amount is determined from the measured WNM dependence on the word line voltage. As a result, the cumulative frequency of the AWNM displays a normal distribution. Together with the maximum likelihood method, a normal distribution of the AWNM drastically improves development efficiency because the write failure probability can be estimated from a small number of samples. The effectiveness of the proposed method is verified using the Monte Carlo simulation.展开更多
If we take Chinese modern literary history( female) as the"center",in which the female creation is very limited,a large amount of female compositions in late Qing Dynasty and R epublican period were "ma...If we take Chinese modern literary history( female) as the"center",in which the female creation is very limited,a large amount of female compositions in late Qing Dynasty and R epublican period were "marginalized",even in the "hidden "state. These "marginalized"female writings,not only are in a large number,but also constitute the foundation of Chinese modern female literature creation,the significance and value cannot be ignored. To seek the strategy and approach for the research on the "marginalized"female creation in late Qing Dynasty and R epublican period,helps to deeply discuss the possibility to expand the object scope of female literature research,to find a newgrowing point of female literature research,and form conversation between female literary history writing and current theory and practice of the"R ewriting Literary History".展开更多
文摘An accelerated evaluation method for the SRAM cell write margin is proposed using the conventional Write Noise Margin (WNM) definition based on the “butterfly curve”. The WNM is measured under a lower word line voltage than the power supply voltage VDD. A lower word line voltage is chosen in order to make the access transistor operate in the saturation mode over a wide range of threshold voltage variation. The final WNM at the VDD word line voltage, the Accelerated Write Noise Margin (AWNM), is obtained by shifting the measured WNM at the lower word line voltage. The WNM shift amount is determined from the measured WNM dependence on the word line voltage. As a result, the cumulative frequency of the AWNM displays a normal distribution. Together with the maximum likelihood method, a normal distribution of the AWNM drastically improves development efficiency because the write failure probability can be estimated from a small number of samples. The effectiveness of the proposed method is verified using the Monte Carlo simulation.
文摘If we take Chinese modern literary history( female) as the"center",in which the female creation is very limited,a large amount of female compositions in late Qing Dynasty and R epublican period were "marginalized",even in the "hidden "state. These "marginalized"female writings,not only are in a large number,but also constitute the foundation of Chinese modern female literature creation,the significance and value cannot be ignored. To seek the strategy and approach for the research on the "marginalized"female creation in late Qing Dynasty and R epublican period,helps to deeply discuss the possibility to expand the object scope of female literature research,to find a newgrowing point of female literature research,and form conversation between female literary history writing and current theory and practice of the"R ewriting Literary History".
