改进的电源抑制线性稳压器

摘要：在便携式通信，低压差线性稳压器（LDO）产生的射频电路的电源电压，这些电压供电时，必须是干净的合成器和压控振荡器（VCO）。供应调节，权力往往包括宽带AC纹波的直流叠加。LDO的预期拒绝这些文物。本文介绍了三种方法改善LDO的电源抑制比（PSRR）。

Maxim>Designsupport>Appnotes>FilterCircuits(Analog)>APP883Maxim>Designsupport>Appnotes>Power-SupplyCircuits>APP883Keywords:powersupplyrejectionratio,PSRR,lowdropoutregulator,LDOs,linearregulators,dampening,filter,noise,voltagecontroloscillator,VCO,lineregulation,quiescentcurrentOct01,2002APPLICATIONNOTE883ImprovedPower-SupplyRejectionforLinearRegulatorsAbstract:Inportablecommunications,low-dropoutlinearregulators(LDOs)generatesupplyvoltagesfortheRFcircuitry;thesevoltagesmustbeespeciallycleanwhenpoweringthesynthesizerandvoltage-controlledoscillator(VCO).Thesupplythatpowers