斯巴达3E是否可用于实现数字电位器？

所以你认为我可以使用DAC FPGA的可调输出而不是数字电位器的输出？
你有一个sigle DAC的sonm VHDL代码吗？
非常感谢



以下为原文

so you you consider that I can use the adjustable output of a DAC FPGA rather than the output of a digital potentiometer?
 
do you have sonm VHDL code for a sigle DAC?
 
thanks a lot

搜索DS588和XAPP154。
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。



以下为原文

Search for DS588 and XAPP154.
 
- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.

嗨，
你真的需要改变电阻，还是想从参考电压产生输出电压（如建议的bob）？
虽然简单的DAC可以用很少的外部硬件制造（有时RC滤波器就足够了），但数字电位器是不同的。
由于您说您需要精度，我建议您使用外部专用部件。
大多数都有标准化的接口，如I2C或SPI。
您可以为这些获得大量免费核心。
此外，如果噪声在模拟设计部分中至关重要，则可以轻松地将其与FPGA隔离。
（例如光耦合器或类似设备）
有一个很好的综合 
Eilert



以下为原文

Hi,
do you really need to change a resistance, or do you want to create an output voltage from a reference voltage (like bob suggested)?
 
While simple DACs can be made with little external hardware (sometimes an RC-filter will be sufficient), a digital potentiometer is something different.
 
Since you say you need precision I would recommend to use an external dedicated part for that purpose. Most have standardized interfaces like I2C or SPI. You can get a lot of free cores for these.
Also, if noise is critical in your analog design part, you can isolate it easily from the FPGA.   (e.g. optocouplers or similar devices)
 
Have a nice synthesis
  Eilert

嗨，好吧，我看看我的设计，我需要改变产品的阻力，进行一些功能测试，
你有什么主意吗？
谢谢



以下为原文

hi there, ok I look at my design and I need to change a resistance in a product to make some functional test,
do you have any idea?
 
thanks

市场上没有集成可变电阻器的FPGA。
您需要使用ADI公司的AD5175外部数字电位器。
------您是否尝试在Google中输入问题？
如果没有，你应该在发布之前。太多结果？
尝试添加网站：www.xilinx.com



以下为原文

There are no FPGAs on the market that have integrated variable resistors.  You need to use an external digital potentiometer like the Analog Devices AD5175 device.
------Have you tried typing your question into Google?  If not you should before posting.
Too many results?  Try adding site:www.xilinx.com

嗨，
这里有一些例子，可用的数字电位器芯片：
http://www.analog.com/en/digital-to-analog-converters/digital-potentiometers/products/index.html
当然还有其他供应商。
只是搜索一下网。
没有关于电路的更多细节，很难更具体。
如果你想在一个有限的范围内微调阻力，你可以组合挖掘锅。
使用一些固定的并联或串联电阻。
简单的电子表格有助于找到正确的零件组合。
有一个很好的综合 
Eilert



以下为原文

Hi,
here are some examples, what digital potentiometer chips are available:
http://www.analog.com/en/digital-to-analog-converters/digital-potentiometers/products/index.html
 
There are other vendors, of course. Just search the net a little.
 
Without further details about the circuit it's hard to be more specific.
If you want to fine tune a resistance over a limited range, you may combine the dig.-pot. with some fixed parallel or series resistors. A simple spreadsheet is helpful for finding the right part combinations.
 
Have a nice synthesis
  Eilert