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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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ADF4382ABCCZ Fiches technique(PDF) 19 Page - Analog Devices |
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ADF4382ABCCZ Fiches technique(HTML) 19 Page - Analog Devices |
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19 / 82 page  Data Sheet ADF4382A THEORY OF OPERATION analog.com Rev. A | 19 of 82 INTRODUCTION A PLL is a complex feedback system that can conceptually be con- sidered a frequency multiplier. The system multiplies the frequency input at REFP/REFN and outputs a higher frequency at RFOUTxP/ RFOUTxN. The PFD, charge pump, output divider, feedback divid- er, VCO, and external loop filter form a feedback loop to accurately control the output frequency (see Figure 42). When operating in integer mode, the reference divider or reference doubler sets the frequency resolution. When operating in fractional mode, the fractional-N divider sets the frequency resolution. Figure 42. PLL Loop Diagram |
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