Phase Locked Loop tutorial

A tutorial showing how Phase-Locked Loops, both analog and digital can be efficiently modeling in Si

Description

This tutorial starts with a simple conceptual model of an analog Phase-Locked Loop (PLL). Through elaboration it ends at a model of an all digital and fixed-point phase-locked loop. The final model can serve a starting point for code generation (both ANSI C or synthesizable HDL).

The step-wise elaboration of the model illustrates how Simulink® forms the basis a model-based design where continuous verification of the model reduces errors.

• Required Products: Communications Blockset; Communications System Toolbox; Control System Toolbox; Fixed-Point Toolbox; DSP System Toolbox; Signal Processing Toolbox; SimPowerSystems; Simulink; Simulink Fixed Point; Stateflow
• MATLAB release: MATLAB 7.4 (R2007a)
• Other requirements: Not all the products are required for all the models (see the published m-file for more details)

[truepeak]

 

[Mike Woodward]

If you're interested in this submission, you might also like the new, free mixed-signal library available from here: http://www.mathworks.com/programs/mixed-signal/index.html

[Yue Wu]

??? Error using ==> construct_error at 109
DOS commands may not be executed when the current
directory is a UNC pathname

Please change the current directory to a local directory
or use a network drive mapped to the current directory.

Warning: Unable to load block diagram 'powerlib'
> In plldemo at 181
??? Error using ==> plldemo at 181
Failed to load library 'powerlib' referenced by
'powerpll/Charge Pump Loop Filter/+10V'.

Caused by:
Error using ==> plldemo at 181
Unable to open file for reading: "powerlib.mdl".

[Dhaval Shah]

 

[Noura Ben Ameur]

i have matlab 7.0 release and the file "dpll.m" does'nt work due to "NCO" block. How can i do?

[M. Cirillo]

You can plot the two curves on one axis using a Mux (in Signal Routing). Run the Mux output to the scope and you'll be able to see the offset more clearly.

[Niceseb cheung]

cp_pll has run time error
"Error reported by S-function 'scominhshape' in cppll/Continous time VCO/Inherit Shape1"
Input and output frame status or dimension are invalid.

?

Also how to plot the 2 input scope on top of each other so I can see the phase offset?

[xiaojian mao]

 

[XIMENA TARIFA PEREZ]

 

[Evgeny Yankevich]

I am looking for fully digital freq traking loop

[Alex RB]

 

[Master Pic]

 

[George Kipens]