阻变存储器(resistive random access memory,RRAM)作为未来一种高性能的非挥发性存储器,具有面积小、操作电压低、兼容性好等特点.但是,在高集成存储器和频繁的写操作下,热串扰问题会严重影响RRAM的保持特性.严重情况下,热串扰问题甚...阻变存储器(resistive random access memory,RRAM)作为未来一种高性能的非挥发性存储器,具有面积小、操作电压低、兼容性好等特点.但是,在高集成存储器和频繁的写操作下,热串扰问题会严重影响RRAM的保持特性.严重情况下,热串扰问题甚至会造成一系列的错误翻转.因此,本文引入了一种高效的奇偶重排编码算法(parity rearrangement coding scheme,PRCoder)来有效缓解热串扰对RRAM的影响,并在算法层和电路层上分别进行设计与仿真.试验结果表明,PRCoder算法平均降低了32.7%的误翻转率,并同时只会在每一个存储行带来1bit的额外开销.此外,PRCoder仅仅带来0.3%的性能增加和0.008%的面积增加.展开更多
The silicon microring resonator plays an important role in large-scale,high-integrability modern switching matrixes and optical networks,as silicon photonics enables ring resonators of an unprecedented compact size.Bu...The silicon microring resonator plays an important role in large-scale,high-integrability modern switching matrixes and optical networks,as silicon photonics enables ring resonators of an unprecedented compact size.But as the nature of resonators is their sensitivity to temperature,their performances are vulnerable to being affected by thermal effect.In this paper,we analyze the dominant thermal effects to the application of silicon microring optical switch.On the one hand we theoretically analyze and experimentally measure the thermal crosstalk among adjacent microring optical switches with different distances,and give possible solutions to minimize the affect of thermal crosstalk.On the other hand we analyze and measure the thermooptic dynamic response of microring switch;the experiment shows for the thermal-tuning that the rising edge is around 2/is,and the falling edge is around 35 μs.We give the explanation of the asymmetric rise-time and fall-time.展开更多
基金supported by the Natural National Science Foundation of China(Nos.61235001,61575187,61535002)
文摘The silicon microring resonator plays an important role in large-scale,high-integrability modern switching matrixes and optical networks,as silicon photonics enables ring resonators of an unprecedented compact size.But as the nature of resonators is their sensitivity to temperature,their performances are vulnerable to being affected by thermal effect.In this paper,we analyze the dominant thermal effects to the application of silicon microring optical switch.On the one hand we theoretically analyze and experimentally measure the thermal crosstalk among adjacent microring optical switches with different distances,and give possible solutions to minimize the affect of thermal crosstalk.On the other hand we analyze and measure the thermooptic dynamic response of microring switch;the experiment shows for the thermal-tuning that the rising edge is around 2/is,and the falling edge is around 35 μs.We give the explanation of the asymmetric rise-time and fall-time.
