采样电路的概述
百度 Congressapproves$6millioninbilltoaid‘government-in-exile’TheUSisinterferingwithChinasdomesticpoliticalaffairsbyapprovingincreasedfinancialaidtosupporttheTibetan"government-in-exile,"$8millioninaidto"theTibetansinsideTibet"aswellas$6millionto"thoseinexileinIndiaandNepal,"accordin$3millionfor"programstostrengthenthecapacityofTibetaninstitutionsandgovernance.""AsidefromthetradewarandtheTaiwanTravelAct,financialsupportforTibetanseparatistforcesisthelatestmoveforsomepoliticalforcesintheUStopressureChinaastheydonotwanttoseeChinassmoothdevelopmentandonward,"ZhuWeiqun,chairmanoftheEthnicandReligiousCommitteeoftheChinesePeoplesPoliticalConsultativeConference,toldtheGlobalTimes."ItisnotstrangefortheUStoapprovethebillsinceithasbecomethemainbackstagesupporterofseparatistforces,especiallytheso-calledTibetangovernment-in-exilenspies,"LianXiangmin,anexpertattheChinaTibetologyResearchCenter,"government-in-exile",Liannoted,addingthat2018fundingisthelargestever.",whichisamovethatinterfereswithChinasdomesticaffairs,"$6milliontosupport"Tibetansinexile"in2016,morethanthatof2015,"government-in-exile"from2007to2008,morethan90percentofitsrevenuederivesfromforeigngovernments."Separatistsfromtheso-calledgovernment-in-exilewhoshowedgratitudetotheUSgovernmentforfinancialsupportalsodisplayedtotheworldthattheyarepoliticaltoolsanddogsraisedbytheUStomaketroubleforChina,"Liansaid."PeoplewhoaretheDalaiLamassupportersandwishtousethemoneytomakeamessinChinasTibetAutonomousRegionwillbedisappointedastheywillnevergetachancetoaffectstabilityintheregion,":USinterferinginTibet:Chineseanalysts
采样电路，具有一个模拟信号输入，一个控制信号输入和一个模拟信号输出。该电路的作用是在某个规定的时刻接收输入电压，并在输出端保持该电压直至下次采样开始为止。采样电路通常有一个模拟开关，一个保持电容和一个单位增益为1的同相电路构成。采样工作在采样状态和保持状态的两种状态之一。在采样状态下，开关接通，它尽可能快地跟踪模拟输入信号的电平变化，直到保持信号的到来；在保持状态下，开关断开，跟踪过程停止，它一直保持在开关断开前输入信号的瞬时值。如图5.4-69所示。
关键词： 采样电路
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