c*h
7 楼
use dll align its negative edge with positive edge. The dll delay is 2n
arcitecture. the phase diff is 180 now. take the signal in the middle, the
the phase diff is 90 now. XOR the two signals, u get T/2. Do one more time,
u get T/4.
maybe there is better idea.
【在 h*****i 的大作中提到】![](/moin_static193/solenoid/img/up.png)
: 有一个时钟,周期是T,怎么设计一个电路产生一个T/4的时钟?
: 想了好久,想用delay,然后异或,但是我事先也不知道它的周期呀。
: 非常感谢!!
arcitecture. the phase diff is 180 now. take the signal in the middle, the
the phase diff is 90 now. XOR the two signals, u get T/2. Do one more time,
u get T/4.
maybe there is better idea.
【在 h*****i 的大作中提到】
![](/moin_static193/solenoid/img/up.png)
: 有一个时钟,周期是T,怎么设计一个电路产生一个T/4的时钟?
: 想了好久,想用delay,然后异或,但是我事先也不知道它的周期呀。
: 非常感谢!!
j*j
8 楼
en, althrough it is not the precisely T/4, but should be OK for normal
application.
but make sure the delay line can be locked, which means you should know T is
in some range so that you know how many delay cells you should put in the
delay line.
,
【在 c******h 的大作中提到】![](/moin_static193/solenoid/img/up.png)
: use dll align its negative edge with positive edge. The dll delay is 2n
: arcitecture. the phase diff is 180 now. take the signal in the middle, the
: the phase diff is 90 now. XOR the two signals, u get T/2. Do one more time,
: u get T/4.
: maybe there is better idea.
application.
but make sure the delay line can be locked, which means you should know T is
in some range so that you know how many delay cells you should put in the
delay line.
,
【在 c******h 的大作中提到】
![](/moin_static193/solenoid/img/up.png)
: use dll align its negative edge with positive edge. The dll delay is 2n
: arcitecture. the phase diff is 180 now. take the signal in the middle, the
: the phase diff is 90 now. XOR the two signals, u get T/2. Do one more time,
: u get T/4.
: maybe there is better idea.
h*i
15 楼
看来只有DLL了,我在网上也找不到DLL的 verilog codes.请问哪位有呀?非常感谢,
急用呀。
急用呀。
相关阅读
ACM GLSVLSI咋样,怎么去年接受率只有16%?询问Sandisk面试的情况 (转载)工作中的郁闷:工资越来越高,任务越来越蠢。TI new 300mm fab....学 电路的 master 都从事什么样的工作?哪个方向好?谢谢关于RFID data fusion(数据融合)方向的发展空间Scientific Peer Review (转载)Application Engineer position available大家怎么看待这些貌似很玄的事物?Postdoctoral position in biomedical optics and neural imagi (转载)Delay circuit in clock recovery from a Mancheter code请问做VLSI及time tree有前途没有?Linux上用什么工具标注jpg文件?真心请教各位EE大牛一个问题有人做过gate-level cycle-accurate power estimation吗?问一个有点复杂的优化外行弱问:IEEE life fellow 是不是很难获得的?比亚迪汽车用IGBT正式商用一个实际数据分析的问题