*注意, 之前的 S(t) 中实际上调制因子 m 也代表了信号的最大相位偏移,因此可以得到 jitter 和 spur 的量化关系:例如,若已知 peak-peak 的 deterministic jitter 为0.01UI, 则对应的最大相位偏移 m=0.01*0.5*2*Pi, 因此 P_spur=20log(m/2)=-36dBc PLL 中 reference spur 的计算 PLL 中的 reference ...
请问PLL仿真时的spur frequency是什么意思?谢谢 基本的东西还是要多看看书 杂散频率,主要指鉴频泄露阿 申明:网友回复良莠不齐,仅供参考。如需专业帮助,请学习易迪拓培训专家讲授的ADS视频培训课程。
then Fspur(k) = Fref*k/2*2^n, k=0,1,2,3 n 很大时,Fspur非常密集,且平坦,不存在大的spur if M is event 那么L 明显小得多,因此会产生周期性比较明显的spur。 例如: X=2^24, M=1426064 , gcd(2^24,1426064)=16 fspur1=k*fref /(2*(M/16)) M=1426063, gcd(2^24,1426063)=1 fs...
December 2013 A Simple Method to Accurately Predict PLL Reference Spur Levels Due to Leakage Current Michel Azarian and Will Ezell Presented is a simple model that can be used to accurately predict the level of reference spurs due to charge pump and/or op amp leakage current in a PLL system...
To reduce the reference spur, a low current-mismatch charge pump is carefully designed. A quasi-closed-loop auto frequency control circuit is used to accelerate the lock process of PLL. The PLL is fabricated in 180 nm CMOS Mixed-Signal process while it operates under 1.8 V supply voltage. ...
Integer-N PLL operation and nonidealities are important topics in the design of RF systems. Reference spurs can have a significantly negative impact on overall system performance. The simple model provided by Linear Technology accurately predicts reference spur levels due to leakage current in PLLs ...
The circuits are designed in TSMC 65nm process, and consume 0.81 mW from a 1.2-V power supply. In simulations, the PLL exhibits an in-band phase noise of 112dBc/Hz at a 100-kHz offset, a reference spur of 72.2 dBc, and a lock time of 2.6s. 展开 ...
A leakage current reduction technique is proposed for the pull-down network (PDN), which is used to hibernate the Phase-locked loop (PLL). Due to low leakage current, the PDN results in a PLL with lower reference spur. The switch leakage is minimized by biasing the MOSFET with VGS <; ...
https://www.youtube.com/watch?v=sgPDchYhN-4&t=1s Low-Spur PLL Architectures and Techniques Mike Shuo-Wei Chen, University of Southern California One key design objective of a frequency synthesizer is to minimize the spurious tones, as they can degrade the overall jitter performance or cause ...
This letter introduces a novel phase detector (PD) for suppressing the reference spur in a 40 GHz integer-N phase-locked loop (PLL). Coined as a spur-compensation phase detector (SCPD), the proposed SCPD duplicates itself to an auxiliary path for an edge