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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD9854ASVZ датащи(PDF) 16 Page - Analog Devices |
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AD9854ASVZ датащи(HTML) 16 Page - Analog Devices |
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16 / 52 page  AD9854 Rev. E | Page 16 of 52 TYPICAL APPLICATIONS LPF REFCLK RF/IF INPUT I BASEBAND COS LPF LPF AD9854 Q BASEBAND LPF SIN CHANNEL SELECT FILTERS Figure 25. Quadrature Downconversion LPF REFCLK COS LPF AD9854 SIN RF OUTPUT I BASEBAND Q BASEBAND Figure 26. Direct Conversion Quadrature Upconverter I Q Rx RF IN DUAL 8-/10-BIT ADC DIGITAL DEMODULATOR Rx BASEBAND DIGITAL DATA OUT 8 8 I/Q MIXER AND LOW-PASS FILTER VCA ADC ENCODE ADC CLOCK FREQUENCY LOCKED TO Tx CHIP/ SYMBOL/PN RATE REFERENCE CLOCK 48 CHIP/SYMBOL/PN RATE DATA AD9854 CLOCK GENERATOR AGC Figure 27. Chip Rate Generator in Spread Spectrum Application 50Ω BAND-PASS FILTER 50Ω IOUT AD9854 FUNDAMENTAL FC –FO IMAGE FCLK FC +FO IMAGE BAND-PASS FILTER FC +FO IMAGE AD9854 SPECTRUM FINAL OUTPUT SPECTRUM AMPLIFIER Figure 28. Using an Aliased Image to Generate a High Frequency |
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