Alarm Sounds When RF Transmitter is Out of Range

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Abstract:Thisdesignideaexplainshowa915MHzreceivercansoundanalarmwhenatransmittermovesbeyondapredeterminedboundary.Maxim>DesignSupport>AppNotes>AmplifierandComparatorCircuits>APP5099Maxim>DesignSupport>AppNotes>Oscillators/DelayLines/Timers/Counters>APP5099Maxim>DesignSupport>AppNotes>WirelessandRF>APP5099Keywords:transmitter,RF,receiver,alarm,RFperimeterAug02,2011APPLICATIONNOTE5099AlarmSoundsWhenRFTransmitterisOutofRangeBy:TomAu-YeungCraigSakamotoAbstract:Thisdesignideaexplainshowa915MHzreceivercansoundanalarmwhenatransmittermovesbeyondapredeterminedboundary.AsimilarversionofthisdesignideaappearedintheDecember12,2010issueofEDN.ThereceivercircuitofFigure

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