![phase locked loop matlab simulink model phase locked loop matlab simulink model](https://de.mathworks.com/help/examples/sps_product/win64/ee_phase_locked_loop_02.png)
PrescalerSys.InputName = 'vco_out' % Prescaler (fixed block) VcoSys.InputName = 'lf_out' % VCO (fixed block) LoopFilterSys.InputName = 'cp_out' % Loop filter (tunable block)ĪP = AnalysisPoint( 'X') % Analysis point does not change the architecture of closed-loop system Use the current loop filter resistance and capacitance values as the initial numeric value of the tunable parameters.ĬhargePumpSys.InputName = 'pfd_out' % Charge pump (fixed block)
#PHASE LOCKED LOOP MATLAB SIMULINK MODEL FREE#
Also, specify whether the parameter is free to be tuned.
![phase locked loop matlab simulink model phase locked loop matlab simulink model](https://i.stack.imgur.com/nFD3n.png)
For each parameter, define the initial value and bounds.
![phase locked loop matlab simulink model phase locked loop matlab simulink model](https://slideplayer.com/5089468/16/images/slide_1.jpg)
To model the loop filter as a tunable element, first create tunable scalar real parameters (see realp (Control System Toolbox)) to represent each filter component. PllC4 = 9.21e-11 % Loop filter capacitance for fourth-order response (F) Build Custom Tunable System PllC3 = 1.59e-10 % Loop filter capacitance for third-order response (F) PllC2 = 1.48e-7 % Loop filter capacitance for second-order response (F) PllC1 = 8.13e-10 % Loop filter direct capacitance (F) PllR4 = 642 % Loop filter resistance for fourth-order response (ohms) PllR3 = 253 % Loop filter resistance for third-order response (ohms) PllR2 = 88.3 % Loop filter resistance for second-order response (ohms) PllKphi = 5e-3 % Charge pump output current