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张家旺

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[问答]

DCM如何创建CLK2X信号和CLKFX信号?

我想知道DCM如何使CLKIN的频率加倍,或使频率比CLKIN的频率多一倍。
哪条电路可以做到?有人可以给我一个插图吗?
谢谢!

以上来自于谷歌翻译


以下为原文

I want to know how does the DCM doubles the frequency of CLKIN or make the frequency more times than CLKIN's.
Which circuit can do it ?Can anybody give me a illustration?
Thanks!

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曾玲娟

2019-5-9 14:47:59
我不是在硬件设计团队,但会期望这种详细程度不公开,因为它可能被认为是“商业秘密”,“专有设计信息”等。
我们通常不会帮助人们设计功能相同的电路。
;)
如果您需要FPGA外部的类似功能,我建议:
- 使用商用PLL设备
- 关于PLL设计技术的文本或其他资源。
[我确实理解DCM和PLL在设计上有根本的不同 - 但是有关PLL设计技术的更多信息 - 对于大多数情况而言,区别可能并不重要]
专利申请中可能会公开提供一些信息,但我不知道是否属于这种情况。
BT

以上来自于谷歌翻译


以下为原文

I'm not on the hardware design team, but would expect that this level of detail is not publicly available as it is likely considered "trade-secret", "proprietary design information", etc.

 

We're generally not in the business of helping people design functionally equivalent circuits. ;)

 

If you have a need to a similar function external to the FPGA, I would suggest either:

-use a commercial PLL device

-review texts or other resources on PLL design techiques.

[I do understand that DCMs and PLLs are fundamentally different in their design- but there is much more information available on PLL design techniques  - the distinction is likely unimportant for most cases]

 

It is always possible that there is some information publicly available in patent filings, but I don't specifically know if that is the case.

 

bt
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