如果timing check语句中移除了notifier这个可选项,虽然并不会有语法问题,但却会导致在有timing violation发生时,寄存器不再变为x,这样很容易把bug给忽略掉。 在不想check timing的地方如何避免x的产生 包含跨时钟域(CDC,Clock Domain Crossing)的电路中,由于source clock和destination clock的相位是随机不定的,一个dom...
Low pulse width If talking in terms of low signals, it is the the interval between falling edge of the signal crossing 50% of VDD and the rising edge of signal crossing 50% of VDD. 以下图为例,一个时钟信号 CLK,经过六级普通buffer(各自的 rise time 和 fall time 是不相同的) 到达一个寄存...
Billy No-Mates biological clock is ticking bird in a gilded cage Bird in the hand is worth two (2) in the bush. Birds of a feather flock together. bite me bite off more than you can chew bite the bullet bite the dust bite your tongue black as pitch blackball someone black sheep of...
s second destination in West Bengal after Bagdogra. The new launch the airline hopes will help inter-state connectivity and ease travel to the eastern belt of the country. Since its launch, the airlines has carried more than 2 million revenue passengers, crossing the milestone of running 900 ...
Clock buffer 能够驱动较长的 net 以及更多的 fanout 普通buffer 如何导致 pulse width violation? 图2 显示了 Wp = 100nm&Wn = 100nm 的 Buffer 电路的示意图。β比率(PMOS 的宽度与 NMOS 的宽度的比率)由于 NMOS 的迁移率高于 PMOS,因此上升时间大于下降时间。这个结论是根据电流公式得出的,不懂的请移步模...