timmc6
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Posts: 6
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Hello,
I am trying to design a Frac N PLL using an all digital ΣΔ modulator. All literature I have found so far refer to the ΣΔ as an ADC or DAC, but it seems to me that the modulator should have a digital input and digital output. Can any help clarify this, and maybe point me to some literature that talks about the design of ΣΔ's used in Frac N PLL's? Thanks.
Tim
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