Transcription of Demystifying the Operational Transconductance Amplifier ...
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Demystifying the Operational Transconductance Amplifier ...
1 SBOA117A May 2009 RevisedApril2013 SubmitDocumentationFeedbackCopyright 2009 2013,TexasInstrumentsIncorporatedDemysti fyingthe OperationalTransconductanceAmplifierAll trademarksare the propertyof May 2009 RevisedApril2013 Demystifyingthe (OTAs) ,thesedevicesservea veryusefulfunctionthat is beingimplementedon a regularbasisin manyintegratedcircuitsas an elementfor moreadvancedpurposes;the currentfeedbackamplifieris amongthe purposeof this applicationreportis to showhow also developsseveralexamplesof how this typeof componentcan be put togooduse for of an of Figures1 TypicalOTAE lementsand the (CC Type2) with the the versatilebuildingblocksthat intrinsicallyofferwidebandwidthfor manytypesof ,or voltage-controlledcurrentsource,can be viewedas an the transistormodel,ithas threeterminals:a high inputimpedance(base,orB); a low-impedanceinput/output(emitter,orE);a nd a currentoutput(collector,orC).
If a slower amplifier were desired, to select the frequency response a capacitor in parallel with C2 can be added. Alternatively, the feedback resistor RF can be increased. 3.2 Control-Loop Amplifier The input stage of the control-loop amplifier …
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