作为抖动滤波器,通常假设PLL为缓冲器,并在时钟输出端口上再生输入频率。通常将BANDWIDTH属性设为Low能实现更大的抖动滤波,但会导致PLL的静态偏移增大。 2.5 限制 PLL在VCO工作范围、最小和最大输入频率、占空比、相移等方面有一些限制。 VCO工作范围:详见DS202.Table 74.PLL Specification。 最小和最大输入频率:详见...
锁相环 PLL 第16讲 龙骧虎步 Optimizing Loop Bandwidth, 视频播放量 5654、弹幕量 10、点赞数 173、投硬币枚数 140、收藏人数 67、转发人数 14, 视频作者 鳌中堂讲电路, 作者简介 ,相关视频:锁相环 PLL 第1讲 盘古开天 Introduction,锁相环 PLL 第45讲 涅盘重生 Digital
The constant loop bandwidth over the above tuning frequency ranges is achieved without modifying low pass filter parameters. The current of charge pump \\(Icp\\) is programmed not only to compensate the variation of voltage-controlled oscillator gain \\(Kvco\\) , but also for adapting to the...
The design of this block can be dominated by either of these considerations, or can be a complex process juggling the interactions of the two. Typical trade-offs are: increasing the bandwidth usually degrades the stability or too much damping for better stability will reduce the speed and incre...
How to decide the bandwidth of a PLL? Hello, Since the bandwidth is related with the divider ratio N, so if we increase the N, the bandwidth will decrease, then we may increase the charge pump current to maintain a constant bandwidth....
A loop filter’s bandwidth can be doubled by doubling either the PFD frequency or the charge-pump current. If the actual Kv of the VCO is significantly higher than the nominal Kv used to design the loop filter, the loop bandwidth will be significantly wider than expected. The variation of...
Keywords: PLL,PFD,Charge pump锁相环,鉴相鉴频器,电荷泵 Full-Text Cite this paper Add to My Lib Abstract: The relationships between loop performance (settling time, phase noise and spur signal) and loop parameters (bandwidth and phase margin) are briefly discussed in the paper. An adaptiv...
if (Locking_Time_meet_SPEC=1) LoopBandwidth=LoopBandwith*k END Iteration from start point 晕哪埃 以我的經驗PLL的頻寬 << reference frequency15 ~ 20倍,我是穩定度的考量和系統需求 以穩定度的觀點來看, 假如PLL採用的是CP(CHARGE PUMP)的架構,在推導CP公式的時候,我們是用連續的系統去近似一個離散的...
[17] L. Lou, B. Chen, K. Tang, S. Liu, and Y. Zheng, “An ultra-wideband low-power ADPLL chirp synthesizer with adaptive loop bandwidth in 65nm CMOS,” in Proc. IEEE Radio Freq. Integr. Circuits Symp. (RFIC), May 2016, pp. 35–38. ...
4.2.2. Programmable Bandwidth with Advanced Parameters An advanced level of control is also possible for precise control of the PLL loop filter characteristics. This level allows you to explicitly select the following advanced parameters: • Charge pump current (charge_pump_current) • Loop ...