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AD9954/PCBZ1 датащи(PDF) 35 Page - Analog Devices |
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AD9954/PCBZ1 датащи(HTML) 35 Page - Analog Devices |
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35 / 40 page ![]() AD9954 Rev. B | Page 35 of 40 SUGGESTED APPLICATION CIRCUITS LPF AD9954 REFCLK RF/IF INPUT MODULATED/ DEMODULATED SIGNAL Figure 31. Synchronized LO for Upconversion/Downconversion FILTER PHASE COMPARATOR LOOP FILTER AD9954 TUNING WORD REF SIGNAL VCO Figure 32. Digitally Programmable Divide-by-N Function in PLL TUNING WORD CMOS LEVEL CLOCK AD9954 DDS AD9954 ON-CHIP COMPARATOR IOUT IOUT LPF LPF Figure 33. Frequency Agile Clock Generator CRYSTAL FREQUENCY TUNING WORD PHASE OFFSET WORD 2 I/I-BAR BASEBAND FREQUENCY TUNING WORD PHASE OFFSET WORD 1 Q/Q-BAR BASEBAND SYNC_IN AD9954 DDS REFCLK REFCLK REFCLK LPF SYNC_OUT CRYSTAL OUT AD9954 DDS IOUT IOUT LPF IOUT IOUT RF OUT Figure 34. Two AD9954s Synchronized to Provide I and Q Carriers with Independent Phase Offsets for Nulling |
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