Difference between digital and analog pll
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Well, the major difference in an Analog and Digital PLL is that the PD in analog is a mixer, which generates the control voltage.
While in digital it is a PFD(Two D-flops and an AND gate)+ Charge pump which generate the control voltage
There is another concept called All digital PLL which uses a Delay locked loop rather than a VCO for its frequency generation. Hence the Control voltage generation can be a bit based. This is a bit more complicated than the normal Analog PLL. This PLL is useful for pure CMOS implementation
While in digital it is a PFD(Two D-flops and an AND gate)+ Charge pump which generate the control voltage
There is another concept called All digital PLL which uses a Delay locked loop rather than a VCO for its frequency generation. Hence the Control voltage generation can be a bit based. This is a bit more complicated than the normal Analog PLL. This PLL is useful for pure CMOS implementation
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