白噪声发生器的1 / f组件

摘要：在这个噪声发生器电路，放大器（MAX4238）有没有在其输入电压噪声的1/f的组成部分。它自己的输入电压噪声放大与低电阻值作出了反馈网络，无论是从电阻器或放大器的输入噪声电流以避免增加明显的1/F噪声。Maxim>AppNotes>AudioCircuitsSignalGenerationCircuitsKeywords:whitenoise,pinknoise,flickernoise,1/fnoise,low-noiseopampsDec06,2010APPLICATIONNOTE4527White-NoiseGeneratorHasNo1/fComponentAbstract:Inthisnoise-generatorcircuit,theamplifier(MAX4238)hasno1/fcomponentinitsinputvoltagenoise.Itamplifiesitsowninput-voltagenoisewithafeedbacknetworkmadewithlow-valueresistors,toavoidaddingnoticeable1/fnoiseeitherfromtheresistorsorfromtheamplifier’sinputnoisecurrent.AsimilarversionofthisarticleappearedintheMarch20,2008issueofEDNmagazine.White-noisegenerators(thoseforwhichthegraphofoutput-powerdensityvs.frequencyisflat)areusefulfort