Re: PLL application
the PLL has many application
about ur question u have a VCO with 2 GHz , and the phase detector to detect the phse difference between thr VCO and Xtal oscillaot "there is no Xtal oscillator running in 2 GHz"
but between the VCO and phase detector we usually insert a frequncy divider
and this called Frequncy synthizer
there are alot of applications of the pll
1) frequncy synthises
2) FM modulation , and demodulation
3) clock synchronization , and desewking
and many more
khouly