接收端用恢复时钟进行采样时能够看到的抖动与抖动频率间的关系有时我们会用OJTF（Observed Jitter Transfer...
时钟不确定性受到了多个因素的影响,其中一个因素是clock jitter,关于clock jitter,PERIOD约束中有一个INPUT JITTER的关键字告诉综合工具输入时钟的jitter。譬如 不同情况下,Clock Uncertainty 的计算方式是不一样的,譬如DCM时钟下 Clock Uncertainty = [√(INPUT_JITTER² + SYSTEM_JITTER²) + DCM_Discrete_Jitte...
clock jitter,抖动来自时钟的产生源,比如晶振、PLL,可以理解为 PLL jitter,是频率上的不确定性,是频偏,即针对这一个时钟,前后周期在变,jitter = T2 - T1(或者也存在占空比上的不确定性); clock skew,偏斜来自时钟树的延迟,是一个时钟到达不同时序逻辑单元的时刻不同,但是周期是不变的,存在相位差,是相偏,可...
1. 打开Vivado,进入时序约束(Timing Contraints),可以看到Set Input Jitter 和 Set System Jitter、Set Clock Uncertainty 2. 点击Set Clock Uncertainty,单击上方+号添加新约束。 3. Uncertainty value 设置不确定时间 Uncertainty applies to设置不确定时间的应用范围, Clock Uncertainty Type下可以选择使用Simple uncerta...
时钟不确定性受到了多个因素的影响，其中⼀个因素是clock jitter，关于clock jitter，PERIOD约束中有⼀个INPUT JITTER的关键字告诉综合⼯具输⼊时钟的jitter。譬如 不同情况下，Clock Uncertainty 的计算⽅式是不⼀样的，譬如DCM时钟下 Clock Uncertainty = [√(INPUT_JITTER² + SYSTEM_JITTER²) + ...
There is provided a method for analyzing a jitter of a clock flowing in a clock path inside a semiconductor integrated circuit. Elements, which belong to any clock domains except for a selected clock domain among operation scenario information, are brought into a halting state, to create a ...
In a voltage drop analysis step S, the process calculates a temporal variation of a power source voltage supplied to each cell along a transmission path of a clock signal. In a delay variation rate ratio calculation step S, the process calculates a delay time variation of each cell according...
interclock_skew:报出design中,所有clock launch path和capture path上的latency还有skew情况,针对clock launch path和clock capture path不是同一个clock而言。见例子1 jitter:报出每一个clock end point上late和early的jitter值,见例子2 skew: 报出design中,所有clock launch path和capture path上的latency还有skew情...
setup的clock uncertainty = jitter hold的clock uncertainty = 0 时钟树级数 时钟树其实是由buffer一级一级串行级联下去组成,每一个分结点就化分成一级,如下图所示 通常来说,我们期望时钟树的级数越少越好,因为这样tree上的common path最长,受到OCV和PVT因素的影响也最小,时钟的性能也最好。但是,这样情况下tree很...
In this article, a novel tunable, blocker and clock jitter tolerant, low power, quadrature phase shift frequency selective (QPS-FS) receiver with energy harvesting capability is proposed. The receiver's design embraces and integrates (i) the baseband to radio frequency (RF) impedance translation ...