who can tell me the principle of pll

[diode_4001]

who can tell me the principle of pll?

 

[road_0506]

yeah, i need it, too...
pls upload any block diagram with matching explanation of it...
thanks in advance.
regards...

 

[Jepeto]

Phase-Locked Loop Tutorial
**broken link removed**

PLL links
http://www.circuitsage.com/pll.html

Phase-Locked Loops: A Control Centric Tutorial
**broken link removed**

The CD4046 datasheet is good PLL source also

 

[Miguel Gaspar]

Well the principle is to make equal the phase of two signals. If the diference of two fases are equal, the frequency is equal too.

 

[nassim_el85]

Hi

Behzad Razavi's book on "Design of Analog CMOS Integrated circuits" or the "RF Microelectronics" one has a very powerful and sweet chapter on principals of PLL. I refer you all to take a look on it.

 

[enggan]

hi
the heart of pll is a voltage controlled oscillator which generates a frequency depending upon the difference between its own frequency and a refrence frequency both the frequencies to be compared are fed to a circuit called phase frequency detector which generates a error voltage called control voltage of VCO

if u want a detailed study of pll u should download the book of F.M.Gardner which is availabe for download on eda board