图1是Xilinx D Flip-Flop的示意图。D端是我们熟悉的数据输入端,Q端是数据输出端,C端则是时钟输入端,CLR是复位端(上一篇专栏文章提到的)。CE端便是这次我们要了解的Clock Enable。 图1 - DFF with Clock Enable and Asynchronous Clear 那么CE端有什么用呢,Xilinx文档里有这样的描述 When clock enable (CE) ...
从外部输入的两个主时钟CLK_50M和CLK_100M,其建立时间报告如下两图,此时没做约束,因此只有T_{sj}=sqrt(0.05^2+0.05^2)=0.071ns 然后再由公式Clock\ Uncertainty=\frac{\sqrt{T_{sj}^2+T_{ij}^2+D_j}}{2}+PE+UU,得0.035ns 下面对输入时钟CLK_50M设置输入抖动值0.120ns,系统抖动0.150ns set_input...
网络时钟触发器;变变 网络释义
In the ALM block diagram shown above, in the D flip flop, I can see the D input, the Clk input, CLR input and the Q output but i cannot see the ENA(enable) pin? How is the Enable pin(ENA) on the D flip flop seen in my RTL viewer getting implemented ...
最小脉冲宽度检查可确保时钟信号的宽度足够宽,以便采集到正确的数据,保证设计功能。即为了获得稳定的输出,需要确保时钟信号宽度至少达到某个“最小宽度”。比如lib中就对寄存器Flipflop的CLKpin有min pulse width的check。 High pulse width If you need a formal definition of theterm, it is the interval between...
最小脉冲宽度检查可确保时钟信号的宽度足够宽,以便采集到正确的数据,保证设计功能。即为了获得稳定的输出,需要确保时钟信号宽度至少达到某个 “最小宽度”。比如 lib 中就对寄存器 Flipflop 的 CLK pin 有 min pulse width 的 check。 High pulse width ...
United States Patent US9621144 Note: If you have problems viewing the PDF, please make sure you have the latest version ofAdobe Acrobat. Back to full text
United States Patent US5774003 Note: If you have problems viewing the PDF, please make sure you have the latest version ofAdobe Acrobat. Back to full text
Lin, S., et al.: A Vdd/2 clock swing D flip flop by using output feedback and MTCMOS. Electronic Letters (submitted, 2006) Sheu, B.J., et al.: BSIM: Berkeley short-channel IGFET model for MOS transistors. IEEE J. Solid-State Circuits 22, 558–566 (1987) CrossRef Zhao, ...
CLOCK D-TYPE FLIP-FLOP CIRCUIT 优质文献 相似文献A 80-Gbit/s D-type flip-flop circuit using InP HEMT technology 80 Gbit/s operation of a static D-type flip-flop (D-FF) circuit was achieved using InP-based HEMT technology with a cut-off frequency of 245 GHz and a tran... ...