排序方式: 共有47条查询结果,搜索用时 31 毫秒
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通过对PLL和DLL相位抖动的比较,结合DLL倍频器的结构特点,得出了一个有用的公式,这个公式可以用于在PLL和DLL两种结构中选择出一个最佳方案,使得在使用CMOS工艺实现频率合成器时能够得到最佳的功耗和相位抖动的折衷.对于倍频系数很大的倍频器宜采用基于PLL的结构,这样可以消耗较少的功率;而对于较小的倍频系数的倍频器要采用基于DLL的结构,这样相位抖动特性将非常优良. 相似文献
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Generation of tunable multi-wavelength optical short pulses using self-seeded Fabry-Perot laser diode and tilted multimode fiber Bragg grating 总被引:1,自引:0,他引:1
We experimentally demonstrate the simultaneous generation of tunable multi-wavelength picosecond laser pulses using a self-seeding configuration that consists of a gain-switched Fabry-Perot laser diode (FPLD) with an external cavity formed by a tilted multimode fiber Bragg grating.Dualand triple-wavelength pulses are obtained and tuned in a flexible manner by changing the temperature of the FPLD.The side mode suppression ratio larger than 25 dB is achieved at different dualand triple-wavelengths and the typical pulsewidth of the output pulses is ~70 ps.In the experiment,the wavelength separation can be narrowed to 0.57 nm. 相似文献
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通过光纤传输的微波信号具有传输距离远、低损耗、传输带宽宽等特点,但在实际应用中,光链路容易受到温度、抖动等影响,使得微波信号在长距离光纤传输过程中容易出现相位抖动或者延迟现象.针对这一现象,提出了一种基于STM32处理器的长距离光纤微波信号稳相传输系统,本文的研究对于微波信号稳相传输技术的工程应用具有一定的指导意义. 相似文献