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HCF4046M013TR 데이터시트(PDF) 9 Page - STMicroelectronics |
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HCF4046M013TR 데이터시트(HTML) 9 Page - STMicroelectronics |
9 / 12 page HCF4046B 9/12 DESIGN INFORMATION This information is a guide for approximating the value of external components in a Phase-Locked-Loop system. The selected external components must be within the following ranges: 5K Ω ≤ R 1, R2, RS ≤ 1MΩ C1 ≥ 100pF at VDD ≥ 5V C1 ≥ 50pF at VDD ≥ 10V For further information, see (1) F. Gardner, "Phase-Lock Techniques" John Wiley and Sons, New York, 1966 (2) G.S. Mosckytz "miniaturized RC filters using phase Lockedloop" BSTJ May 1965 CHARACTERISTICS USING PHASE COMPARATOR I USING PHASE COMPARATOR II VCO WITHOUT OFFSET R2= ∞ VCO WITH OFFSET VCO WITHOUT OFFSET R2= ∞ VCO WITH OFFSET VCO Frequency For No Signal Input VCO in PLL System will Adjust to Centre Frequency fo VCO in PLL System will Adjust to Lowest Operating Frequency fo Frequency Lock Range, 2fL 2 fL = Full VCO Frequency Range 2fL = fmax - fmin Frequency Lock Range, 2fC fC = fL Loop filter Component Section Phase Angle Between SIgnal and Comparator 90° at Centre frequency (fO), approximating 0° and 180° at ends of lock range (2 fL) Always 0° in lock Locks on Harmonics of Centre Frequency Yes No Signal Input Nose Rejec- tion High Low |
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