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156 Threads found on Pll Best
I couldn't find the pll software for Roland version 5/6 . Can any one provide a URL to download the software? best
The drawing in post#1 shows a linearized pll model which is applicable under locked condidtions only - and for a "moderate" phase difference between input and output (< 30 deg). Therefore, it is correct that the input and output quantities are PHASE informations in the Laplace domain.
I have been designing pll circuits using VCOs to generate carrier frequencies close to 4GHz. The VCOs come with wide tuning range,but quite bad close-in phase noise. My application demands,best possible phase noise,atleast an improvement of 10 folds over VCO based pll. I looked for options, and found that DRO based carrier (...)
Please recommend me some books on fractional synthesizer design. Don't mention best or Gardner.
Please suggest me best Book for Design a High Performance CMOS pll in SPICE
A charge pumping pll will always have some activity on Vtune because pumped charge is quantized and has some deadband in the phase detector. Drifts on Vtune from leakage etc. will demand an occasional "refresh" in the best case. Question is, is the "ripple" sinusoidal (as ought to come from a classical stability issue) or triangular / trapezoida
I know that I can use an oscillator or perhaps a pll. A pll appears to be a more complex component and I am not sure how I shall use it right now. Anyway, this question is related to Texas Instrument's PCM1808 Audio ADC. It needs a clock input. The table in its data shows the the relationship between sampling rate and the clock input. It says:
Why hasn't anyone answered to this post. I, too, need some good books on pll. I have heard about Gardner's book and Roland best's book but those are either unavailable in my region or are very costly. Please recommend some books on pll.
The dissipation factor or Loss Tangent or complex impedance of water can be done with high voltage if in the GΩ range, but constant current is best method then use pll quadrature detector to measure VI directly or use phase angle vectorfrom a phase detector and measure amplitude of voltage from CC source. . Omega Meters tend to use high vo
in any case output jitter levels will be high. I was about to mention the same thing. Yes you can chain pll's, but before you go too far with this in your project best calculate + verify jitter first. That way you can check your favorite datasheets if it's going to be a problem.
Hello there, it only Internal 4 MHz oscillator . from 6 or 8 MHz use External Crystal.unfortunately there is no build in pll module also.. best regards,
I don't think this is possible except if you use a pll to control the oscillator frequency, (but the pll need a reference frequency provided by a crystal oscillator).
If it were me, I would either do a pll, or use a Hittite X8 HMC444LP4
Hi all, iam finished my pll inCP90nm.After locking my pll the control voltage variation will be 6mV...After adding Decoupling capacitor(Decap=150p) between supply and ground the control voltage variation will be reduced to3.5mV... my questions are 1) How much value of control voltage variation is best? 2) If i need (...)
hi ur frequency after pll never exceed to 40 Mhz. be carefull
What is adjustable pulse width (APW) scheme??..What is its scope in pll... please specify frequency,adjusting methods etc. is it possible a micro controller based design...? best wishes
I have some problem in model the Maneatis' pll,which is called self-biased pll. Anyone have the detail information,could you please E-mail me to Regards !
It is strange for the VCO to get a single freqency with 4.3/4.7V vtune. One case should be unlocked. You can try to tune the Charge pump current register to observe and optimize the phase noise. ADF4157 has best performance when VTUner is btween 0.5V and Vp-0.5V. The Vp should be clean. I second that opinion. Some
Hi I want to design a pll,and i dont know how can i design a first order low pas filter,i cant use matlab functions,and i want to write a filter my self,i would appreciate if anybody can help me.
I want to learn about pll basics and also its IC. I would be really happy if you could provide me some link. Thanks in advance.