pll sigma delta
2016-08-23
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There are four files required for Fractional-N PLL Simulation
-- FN_PLL_readme.txt (this file)
-- FN_PLL4_MASH4_GSM_sim.m (matlab script to run the simulation)
-- FN_PLL4_MASH4_GSM.c (C source file)
-- FN_PLL4_MASH4_GSM.dll (dynamically link library file obtained from comlilation of the C source code)
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HOW TO BEGIN
Copy these files into the same directory and edit "FN_PLL4_MASH4_GSM_sim.m" to set the synthesizer
parameters.
Especially, change the desired output frequency to
f_desired=905e6 at line 56 in "FN_PLL4_MASH4_GSM_sim.m" (you can set it anywhere between 880-915 MHz in 200 KHz increments, but
this would be helpful to observe the fractional spurs)
Also be ensured that the initial condition on the first accumulator in the MASH model
is set to "zer
matlab
pll
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