本帖最后由 超級狗 于 2024-9-23 12:56 编辑 . ?/ @8 j9 X% }- r' t9 H9 H/ w
/ e$ _8 g \# q5 L CPOUT $ Q% e* p, H U' C0 vCharge-Pump Output. Connect a PLL loop filter as a shunt C and a shunt combination of series R and C.- ^5 I2 ?" q4 d1 U. C# w
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踢哀（TI）E2E 論壇 ) D& U% t3 V3 r3 N1 S4 |! Q. ~As for the CPout pin, this is the charge pump output which can range from 0 to 2.5V, as it is powered by a 2.5V regulator. If this voltage falls below 0.5 V or goes above 2.0 V, then the Vtune lock detect will consider this unlocked. When the VCO is calibrated, this targes a voltage of around 1.2 volts, but this voltage can "tune" to adjust the VCO frequency.9 i2 v& c3 P. u! I9 S
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超級狗 发表于 2024-9-23 12:50 ; T3 i5 G1 S% k! z, c踢哀（TI）E2E 論壇 # ?. V/ F8 Y' iAs for the CPout pin, this is the charge pump output which can range from 0 to 2 ...
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感谢，刚看TI的资料，这应该会对相位噪声有点影响。( p6 W; k/ P: B3 C
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发表于 2024-9-23 12:44
