ZBT(Zero Bus Trunaround)SRAM是一种高速同步存储器,该存储器在读写周期交替时不需要等待时间。本文针对该存储器在异步系统应用中的信号同步问题,以及利用该存储器实现交替读写的问题,提出了一种ZBT SRAM接口控制器的设计方法。通过对...ZBT(Zero Bus Trunaround)SRAM是一种高速同步存储器,该存储器在读写周期交替时不需要等待时间。本文针对该存储器在异步系统应用中的信号同步问题,以及利用该存储器实现交替读写的问题,提出了一种ZBT SRAM接口控制器的设计方法。通过对ZBT SRAM工作原理及其读写操作时序的分析,提出了以FPGA为平台实现的接口控制器的设计方案,利用QUARTUS II软件编写接口控制器实现程序,最后通过软件仿真,以及在任意波形发生器中的实例应用,证明了该接口控制器的可行性和实用性。展开更多
We report temperature-dependent behavior of the zero bias tunneling conductance(ZBTC),derived from tun neling spectroscopies on as-grown Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)single crystals taken with evaporated Zn and...We report temperature-dependent behavior of the zero bias tunneling conductance(ZBTC),derived from tun neling spectroscopies on as-grown Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)single crystals taken with evaporated Zn and Pb planar junctions.At Tc the measured ZBTC shows a kink which gives an in situ measure of the superconducting transition temperature(T_(c)).Below T_(c),the T^(2)dependence of the ZBTC has been observed repeatedly as a new evidence of the d-wave symmetry in Bi2212.展开更多
基金Supported by a grant for State Key Program for Basic Research of China,and the National Center for Research&Development on Superconductivity.
文摘We report temperature-dependent behavior of the zero bias tunneling conductance(ZBTC),derived from tun neling spectroscopies on as-grown Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)single crystals taken with evaporated Zn and Pb planar junctions.At Tc the measured ZBTC shows a kink which gives an in situ measure of the superconducting transition temperature(T_(c)).Below T_(c),the T^(2)dependence of the ZBTC has been observed repeatedly as a new evidence of the d-wave symmetry in Bi2212.
