shady205
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active loop filter calculator
can anyone help me out how to calculate the gain of the loop filter....
ωN /ωref =( Kpd * Kvcdl * Icp * Kl )/ 2Π Cloop
where ωN = Close Loop BW
ωref = input reference frequency
Kpd , Kvcdl , Kl are the gains of Phase detector , VCDL , loop Filter
Icp = charege pump current
Cloop = loop capacitor....
in the above equation,by following design guideline the ratio considered is 1: 10 because inorder to make the small signal AC model of the DLL the above design consideration is done...
how to find Kl ,Cloop.....
Kpd = Vh - Vl / 2π
Kvcdl = 2π (Tmax - Tmin)/ (Vh-Vl)
my input reference freq is 100Mhz..
can anyone help me out how to calculate the gain of the loop filter....
ωN /ωref =( Kpd * Kvcdl * Icp * Kl )/ 2Π Cloop
where ωN = Close Loop BW
ωref = input reference frequency
Kpd , Kvcdl , Kl are the gains of Phase detector , VCDL , loop Filter
Icp = charege pump current
Cloop = loop capacitor....
in the above equation,by following design guideline the ratio considered is 1: 10 because inorder to make the small signal AC model of the DLL the above design consideration is done...
how to find Kl ,Cloop.....
Kpd = Vh - Vl / 2π
Kvcdl = 2π (Tmax - Tmin)/ (Vh-Vl)
my input reference freq is 100Mhz..