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MC14XXXBCP Fiches technique(PDF) 9 Page - Motorola, Inc |
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MC14XXXBCP Fiches technique(HTML) 9 Page - Motorola, Inc |
9 / 12 page MOTOROLA CMOS LOGIC DATA 9 MC14568B Figure 8. Frequency Synthesizer Using MC14568B, MC14569B and MC14522B (Without Mixer) Divide ratio = 160N1 + 16N2 + N3 Example: fout = N1 (MHz) + N2 (x 100 kHz) + N3 (x25 kHz) Frequency range = 5 MHz Channel spacing = 25 kHz Reference frequency = 6.25 kHz Figures shown in parenthesis refer to example. Recommended reading: (1) AN535: “Phase–Lock Techniques” (2) AR254: “Phase–Locked Loop Design Articles” (5 MHz) (VDD) VDD VDD PCin C1 CTL “0” MC14568B PCout G F PE VSS VDD DP0 – – – – – DP3 VCO fout DP0 – – – – – DP3 C PE MC14522B “0” Q ZERO DETECT (BCD) BINARY CF C N1 (0 – 5) (625 kHz STEPS) N2 (0 – 9) (62.5 kHz STEPS) N3 (0, 4, 8, 12) (6.25 kHz STEPS) MC14569B |
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