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6 Threads found on Pll Lock Measurement
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
Thanks for all. we get it from simulation only Phase noise is for total pll or only VCO
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 (...)
Hi everyone, 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 measurement resault. I once use (...)
Hi, 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. Regards, Kamesh Kumar S
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