12 Threads found on edaboard.com: Pll Lock Measurement
Inject noise model in the pll then you can measure the output and caculate the jitter from hspice simulation .
Analog Circuit Design :: 31.12.2004 06:48 :: Nobody :: Replies: 13 :: Views: 4296
VCOs are very sensitive to control voltage. So you need to filter it as much as you can. Supply voltage has to be filterd also, and a shield for the board can be necessary.
A good way to measure it is lock with a pll with a very small loop bandwidth. For freqs larger then the loop bandwidth you'll see the VCO phase noise.
A more expensive solutio
Analog IC Design and Layout :: 12.09.2006 09:17 :: Mazz :: Replies: 3 :: Views: 852
how we can measure settling time of a pll synthesizer? by spectrum analyzer?
RF, Microwave, Antennas and Optics :: 10.06.2007 10:58 :: elec350 :: Replies: 10 :: Views: 1548
pll chip :adf4106
charge pump current:2.5mA
loop bandwidth: 800Hz
PHD frequency(reference frequency):3MHz
loop type type A
I want to konw the probably cause.
RF, Microwave, Antennas and Optics :: 03.03.2009 03:40 :: fnx7 :: Replies: 10 :: Views: 2032
Could you suggest me a method for measuring the pll characteristics(Frequency settling and Amplitude settling due to frequency change). Also which measuring instrument i should use for performing this measurement.
Kamesh Kumar S
RF, Microwave, Antennas and Optics :: 08.12.2009 06:34 :: kamesh kumar :: Replies: 4 :: Views: 662
Can some please help for dsPIC 30F3011 Mplab c30 compiler code for filters and phase lock loop.
Digital Signal Processing :: 20.02.2010 00:15 :: Sujitha Dilip :: Replies: 3 :: Views: 1475
I have met a problem on pll lock time. I found that the pll with 10MHz PFD
freq has a great smaller lock time than a pll with 30MHzPFD,although they have
the same loop band width and phase margine. this is an experiment
I once use (...)
RF, Microwave, Antennas and Optics :: 29.06.2010 21:40 :: fenfei :: Replies: 0 :: Views: 426
I am trying to get a simple frequency multiplication scheme to work, but am having trouble getting the pll to lock.
Background:I am sampling (frequency measurement) my signal at 1Hz, I can not sample any slower, and need to get a measurement resolution of 0.1Hz minimum. My input signal goes from 0-1kHz, so at the very low (...)
Analog Circuit Design :: 06.04.2011 12:40 :: abrand :: Replies: 0 :: Views: 1063
Thanks for all.
we get it from simulation only
Phase noise is for total pll or only VCO
Analog Circuit Design :: 01.08.2011 23:09 :: vasusathiyam :: Replies: 4 :: Views: 621
I'm not aware of any oscilloscope, that has built-in a similar analysis function. You should consider, that it would be only reasonable for those signals, that have a clear, dominant frequency. Many signals presented to an oscilloscope don't have it.
It's however possible to generate a similar frequency plot by signal processing of aquired data.
Analog Circuit Design :: 13.09.2011 19:05 :: FvM :: Replies: 11 :: Views: 1607
i want to ask a question regarding the measurement of the frequency
i am looking for a particular signal
the signal to noise ration is not very high
i am detecting the presence of the signal via measuring the amplitude of signal
whenever the strength of the signal is higher then noise level , infact quite high
then i can detect the pr
Analog Circuit Design :: 26.08.2009 07:49 :: malik_123 :: Replies: 1 :: Views: 1588
A bandpass filter is basically a good way. However, if you target to signals of variable frequency, it may get difficult. A standard tool in physical measurement technique implementing your pll idea would be a lock-in amplifier. lock-in amplifier - Wikipedia, the free encyclopedia
Analog Circuit Design :: 22.08.2011 13:58 :: FvM :: Replies: 5 :: Views: 376