The computation of the poles and the zero of a third order PLL type 2 are made with the open loop transfert function of the loop :

[tau1,tau,tau2] = calcul_3eme_ordre(fn,phi,kv,icp,N)

**fn :**real. natural frequency of the open-loop transfert function [Hz]**phi :**real. phase margin at the cut-off frequency [rad]**kv :**real. local sensitivity of the Voltage Controlled Oscillator [Hz/V]**icp :**real. maximum charge pump output current [A]**N :**integer. feedback divider value**tau1 :**real. zero of the transfert function of the loop filter (s)**tau :**real. first pole of the transfert function of the loop filter (s)**tau2 :**real. second pole of the transfert function of the loop filter (s)

- MODNUMSCI/macros/pll/calcul_3eme_ordre.sci [view code]

- [1] U. Rhode, Digital PLL Frequency Synthesizers.Prentice Hall, 1983.