calibrationopen-loop cycle CLK_C lock-in V SupplyVVVV 3131 V Ctrl V0.85V Cpo 0.15V SAR100000100001100 8.22psrms3.95psrms 45.2psp2p31.6psp2p 16.8psrms3.97psrms 74.0psp2p33.2psp2p 80 LConventional L PCalibration z H60 G 4 . 1 f
EXPERIMENT NUMBER 7 Phase Locked Loop (PLL) pdflock rangecapture range of pll
The principle of operation is as follows: The loop is initially closed to lock the rf output, fOUT = N fREF. The modulating signal is turned on and at first the modulation signal is simply the dc mean of the modulation. The loop is then opened, by putting the CP output of the ...
HASE-LOCKloops(PLL‘s)incorporatingsequential-logic, phaselfrequencydetectors(PFD’s)havebeenwidelyused inrecentyears[11-[SI,[6,ch.61.Reasonsfortheirpopular- ityincludeextendedtrackingrange,frequency-aidedacquisi- tion,andlowcost. AchargepumpusuallyaccompaniesthePFD, ...
Figure 4. A PFD out of phase and frequency lock. Figure 5. Phase frequency detector, frequency, and phase lock. Returning to our original example of the noisy clock that requires cleaning, the phase noise profile of the clock, free running VCXO, and closed-loop PLL can be modeled in ADIs...
To measure this frequency shift and, as a result, characterize the surface topography, a Phase-Locked Loop (PLL) is required to lock onto the cantilever's resonance. The PLL error signal will then represent the sample surface. Another typical example of applying PLLs can be found in inertial...
3.4.3 Relationship of Error Function to Closed Loop 103 3.4.4 Output Responses to Unnormalized Input Steps 107 3.4.5 Ramp Phase Solution 109 3.4.6 Parabolic Phase Solution 110 3.5 Acquisition of Lock 112 3.5.1 Derivation of the Second-Order, Nonlinear, Ordinary Differential Equation 114 3.5.2...
Fairchild Semiconductor 74VHC4046 239Kb / 16P CMOS Phase Lock Loop 74VHC4046 221Kb / 16P CMOS Phase Lock Loop List of Unclassifed Man... NE565 348Kb / 6P Phase-Lock Loop Toshiba Semiconductor T4K71 189Kb / 2P Built-in phase lock loop Texas Instruments CD4046BEE4 927Kb / 16P ...
本人最近在Simulink中设计控制回路时,又对这个初级模块的原理产生了兴趣,回顾网上一些网友的解释,发现不少存在问题。因此,重新梳理了一下思路,希望以一种大家容易理解、相对较为正确的角度来理解、实现锁相环(PLL)的设计。当然,也能通过这种方式来让高知把关,确保个人理解的正确性。
[2] W. F. Egan, Phase-Lock Basics, John Wiley and Sons, 1998. ISBN 0-4712 -4261-6 Good introduction to PLLs. See also the same author’s Frequency Synthesis by Phase Lock. [3] B. Razavi, Monolithic Phase-Locked-Loops and Clock Recovery Circuits, IEEE Press, 1996. ISBN 0-7803-...