低工作电压放大器实现视频信号分配

具有工业用中最低的输出饱和特性，低压视频放大器LT6205、LT6206、LT6207、LT6550和LT6551为视频设计者提供了采用逻辑电路以降低工作电压的能力。共用电压的能力通过减小功耗和电源转换的复杂度有助于减小板面积、降低成本。advertisementVideoSignalDistributionUsingLowSupplyVoltageAmplifiersDesignNote327JonMunsonIntroductionVideodesignsareoftenpressedtooperateonthelowestpossiblerailvoltages―asimpleresultofthetrendto-wardslowervoltagelogicandtheadvantagesofsharingsupplypotentialswhereverpossible.VideodesignsarefurthercomplicatedbytheneedtoaccommodatethedynamicoffsetvariationinherentinAC-coupleddesignsaspicturecontentvaries.Traditionalopampsrequirerelativelylargeamountsofoutput-swingheadroomandarethereforeimpracticalforACcouplingateven5V.Figure1.Typical1VP-PVideoWaveformLinearTechnologyoffersanewfamilyofvideoopamps