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question on fractional N synthesizer used in GFSK modulation (Read 1250 times)
seekconfessor
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question on fractional N synthesizer used in GFSK modulation
Jul 04th, 2016, 6:14pm
 
hello, all:
I am designing a fractional N synthesizer in GFSK modulation. I am wondering how to make sure that the control voltage Vc of  VCO is set to reasonable value when PLL is locked?
i.e. the dynamic range of Vc is 0.3V~0.9V, if Vc is 0.3V when PLL is locked, the linearity and dynamic range is highly limited when used for GFSK modulation.
Thanks.

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