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TC9328AF датащи(PDF) 45 Page - Toshiba Semiconductor |
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TC9328AF датащи(HTML) 45 Page - Toshiba Semiconductor |
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45 / 84 page ![]() TC9328AF 2004-09-13 45 Note: The filter circuits illustrated in the above diagrams are for reference purposes only. It is necessary to examine the system band configuration and characteristic and design actual circuits in accordance with requirements. 31 33 Vreg DO2/OT/N R4 LPF C2 R3 When filter constant is set up for each band 32 DO1/P FM/VHF VCO R2 C1 R1 AM VCO When LPF is used in common (Set DO2 as high impedance and switch the filter constant) 31 33 Vreg DO2/OT/N R3 LPF C1 R2 32 DO1/P R1 VCO Example of external charge pump circuit (when PN = “1” is set up) 31 33 Vreg DO2/OT/N 32 DO1/P To the VCO variable capacitor DC-DC converter Example of an active low pass filter circuit (for reference) To the VCO variable capacitor 4.7 k Ω 0.01 µF 1 µF 4.7 k Ω 32 DO1/P DC-DC converter 10 k Ω |
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