An s-domain model of an integrated FM continuous wave digital frequency synthesizer
A technology of frequency modulation continuous wave and frequency synthesizer, which is applied in the direction of automatic power control and electrical components, etc., can solve the problems of reduced integration of frequency modulation continuous wave digital frequency synthesizer, and achieve the effect of improving prediction accuracy
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[0039] With time-to-digital converter accuracy ∆ t res =20ps, F VCO =24GHz, loop bandwidth 100kHz, frequency division ratio N =8, crystal oscillator f ref = 48MHz, α=100kHz⁄(48MHz×2π), as an example to show how applying this model predicts frequency error and phase noise performance. Substituting (8) and (9) into equations, we get image 3 and Figure 4 . according to image 3 and Figure 4 , the predicted frequency error at this time is:
[0040]
[0041] Phase noise is 98dB at 1MHz.
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