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KB8821 数据表(PDF) 17 Page - Samsung semiconductor |
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KB8821 数据表(HTML) 17 Page - Samsung semiconductor |
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17 / 21 page ![]() PRELIMINARY SPECIFICATION (V1.5) FREQUENCY SYNTHESIZER KB8821/22/23 17 99-06-15 10 9 8 7 6 5 4 3 2 1 11 12 13 14 15 16 17 18 19 20 foLD GND OSCin GND finRF finRF GND CPoRF VP1 VDD1 CLOCK DATA LE GND finIF finIF GND CPoIF VP2 VDD2 VCO VCO From Controller IF out 100pF 100pF 10pF Rin R2 C3 C4 100pF Vp 0.01 µF 18 Ω VDD 100pF 0.01 µF 0.01 µF 0.01 µF 100pF 0.01 µF VDD VP 100pF 0.01 µF R1 C1 C2 10pF 100pF 100pF RF out 1000pF foLD Reference Input 51 Ω Rin 18 Ω KB882x 20-TSSOP TYPICAL APPLICATION CIRCUIT ** The role of Rin : Rin makes VCO output power go to the load rather than the PLL. The value of Rin depends on the VCO power level. |
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