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时钟 [2017/03/26 18:51] gongyu 创建 |
时钟 [2017/03/26 18:53] (当前版本) gongyu |
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| 晶体和晶振 | 晶体和晶振 | ||
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| 多数FPGA需要稳定的时钟信号，这些时钟信号一般来自"晶体"或"晶振". See Ecliptek, SaRonix and Vite as examples of quartz crystals and oscillators manufacturers. | 多数FPGA需要稳定的时钟信号，这些时钟信号一般来自"晶体"或"晶振". See Ecliptek, SaRonix and Vite as examples of quartz crystals and oscillators manufacturers. | ||
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| The main parameter of a crystal/oscillator is the resonance frequency. The Quartz is cut at the factory, so if you want a different frequency, you have to use a different part. It is useful to have a few different parts available during FPGA prototyping. | The main parameter of a crystal/oscillator is the resonance frequency. The Quartz is cut at the factory, so if you want a different frequency, you have to use a different part. It is useful to have a few different parts available during FPGA prototyping. | ||
| - | 工作原理： | + | 它们都长什么样？ |
| + | {{ :crystals_oscillators.jpg |}} | ||
| 晶体(2个管脚): | 晶体(2个管脚): | ||