Charge-Pump Phase-Lock Loops

Design, Simulation and Validation of HMC833 Loop Filter Based on Matlab

“…It adds two stage capacitor resistance combinations at the back of the 2 order model [2]. In the actual circuit, the first two stage filter plays a major role in the parameters of PLL, loop bandwidth, damping coefficient and phase noise.…”

Nonlinear dynamics of alias-locked loop

“…Typically, charge-pump phase-locked loop frequency synthesizers use an N frequency divider in the feedback path of the PLL [4][5]. A new structure, the alias-locked loop (ALL), drawing on some ideas from [6], was proposed in [7].…”

Design of Fourth Order Digital PLLs Using Filter Prototypes

“…The DPLL can be approximated to a linear transfer function by replacing the CP-PFD block in Fig. 1 with a multiplier and gain component (K P ), and replacing the VCO block with an integrator and a gain component (K V ), as in [1]. The closed loop transfer function, H CL (s), is expressed as in (1).…”

“…The passive filter structure of Fig. 2 is designed by choosing a ω c , of approximately 1/10 th the reference frequency, ω R , this is a rule of thumb based on recommendations and empirical results of [1]. Knowing ω c the components R 1 and C 1 are chosen from the solution to ω c = 1/R 1 C 1 , and C 2 is chosen to be 1/10 th of C 1 .…”