SELECT为0,也就是下半部分电路从此无效,上半部分电路有效,此时需要等到CLK1的下降沿采样SELECT值,在此之前,输出仍未CLK0,到达CLK1的下降沿后,输出变成了CLK1和SELECT的与,也就是CLK1。由图可见,输出时钟完美切换,并没有出现斩波信号以及毛刺。 在时钟的下降沿寄存选择信号(SELECT)可确保在任一时钟处于高电平时输...
时钟无毛刺切换技术,glitch 毛刺,glitch free 无毛刺 随着越来越多的多时钟应用于当今的芯片中(尤其是在通信领域),在芯片运行时经常需要切换时钟源。通常的实现方式是:在硬件中复用两个不同频率的时钟源,并通过内部逻辑控制复用器 MUX。 这两个时钟在频率上可能完全不相关,也可能成倍数关系。不管是哪种情况,都有...
时钟无毛刺切换技术,glitch 毛刺,glitch free 毛刺 随着越来越多的多时钟应用于当今的芯片中(尤其在通信领域),在芯片运行时经常需要切换时钟源。通常的实现方式是:在硬件中复用两个不同频率的时钟,并通过内部逻辑控制复用器 MUX。 这两个时钟在频率上可能完全不相关,也可能成倍数。不管是哪种情况,都有可能在...
数字IC设计知识点及综合题详解(提前批、秋招必刷基础题)——(三)MUX的结构和Glitch free 无毛刺的MUX,程序员大本营,技术文章内容聚合第一站。
glitch free mux(2) `timescale 1ns/10ps module clock_mux ( // OUTPUTs //=== output clk_out, // Clock output // INPUTs //=== input clk_in0, // Clock input 0 input clk_in1, // Clock input 1 input reset, // Reset input select_in ...
designLines Automotive Designline Techniques For Glitch Free Clock Switching (MUX)By Rafey Mahmud 06.26.2003 0 Share Post Share on Facebook Share on Twitter With more and more multi-frequency clocks being used in today’s chips, especially in the communications field, it is often necessary ...
if you register the 39MHz signal through two or more stages of 270MHz then that synchronises it to the fast domain glitch-free. Then you apply mux using 270MHz register before the pin on both signals; the synchronised slow and the fast signals. Translate 0 Kudos...
If you make the assumption that a single LE is glitch free by design then ANY combinatorial logic with up to 4 inputs will be glitch free as it will fit into a single LE. This then enables a 4 to 1 mux to be made glitch free from 3 LEs using the code below. wire x,y /* ...
EVERY LAPTOP for EIGHT YEARS has used lead free solder and the only ones having these issues to this level of insanity are Apple and the $@$* HPs, and also the few that got the dreaded Nvidia chipsets of the late 2000s. The issue here is simple. 1) Slim design. 2) Sandy bridge ...
An additional benefit which is gained by supporting a pulse amplify mode is that parameter checking is simplified for complex cell design. For example, it is desirable in flip flop models to detect violations of setup time, hold time, clock pulse width, etc. This detection can be done by us...