nidahas
Junior Member level 2
![Junior Member level 2](/styles/images/ranks/clevel2.gif)
hi to all
i am using pll to demodulate a square wave .the carrier freq is 800hz where as message is 100hz.i am using simulink to design pll.i am using discrete vco ,phase detector made with flipflops.and fdatool to deign filter.however i am having problems regarding the filter.i dont know how to chose the cutoff frequeny of low pass filter.i have set it to 110 hz.is it ok???
secondly do i need to use charge pump with the flipflops??
your help ang guidance is more then needed.
i am using pll to demodulate a square wave .the carrier freq is 800hz where as message is 100hz.i am using simulink to design pll.i am using discrete vco ,phase detector made with flipflops.and fdatool to deign filter.however i am having problems regarding the filter.i dont know how to chose the cutoff frequeny of low pass filter.i have set it to 110 hz.is it ok???
secondly do i need to use charge pump with the flipflops??
your help ang guidance is more then needed.