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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DAC5687IPZP датащи(PDF) 67 Page - Texas Instruments |
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DAC5687IPZP датащи(HTML) 67 Page - Texas Instruments |
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67 / 79 page  www.ti.com B0041-01 y2 1, −1, 1, ... DAC Ch2 Ch1 RF Processing TRF3750 GC4116 GC5016 GC5316 DUC DAC5687 CDC7005 y2 y2 y2 1, −1, 1, ... DUC DUC DUC DAC RF Processing Application Example: Complex IF to RF Conversion Radio B0042-01 y2 DAC I Q RF Processing TRF3750 DAC5687 CDC7005 y2 y2 y2 DAC NCO CMIX TRF3701 TRF3702 TRF3703 DAC5687 SLWS164E – FEBRUARY 2005 – REVISED SEPTEMBER 2006 Figure 77. System Diagram of a Dual-Channel Real IF Radio The outputs of multiple DAC5687s can be phase synchronized for multiple antenna/beamforming applications. An alternative to a real IF system is to use a complex IF DAC output with analog quadrature modulator, as shown in Figure 78. The same complex baseband input as the real IF system in Figure 76 is used. The DAC5687 would be used to increase the data rate through interpolation and flexibly place the output signal using the FMIX and/or CMIX blocks. Although the DAC5687 X4 mode is shown, any of the modes (X2, X4L, or X8) would be appropriate. Figure 78. Complex IF System Using the DAC5687 in X4L Mode Instead of only using one DAC5687 output as for the real IF output, both DAC5687 outputs are used for a complex IF Hilbert transform pair. The DAC5687 outputs can be expressed as: Copyright © 2005–2006, Texas Instruments Incorporated Submit Documentation Feedback 67 Product Folder Link(s): DAC5687 |
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