2009 · 19 citations · 10 references
EngineeringElectrical EngineeringAnalog ElectronicsLow-power DesignSensorsAnalog Integrated CircuitsAnalog IntegrationCmos Circuit DesignHigh-frequency Power ConversionMixed-signal IntegrationRadio-frequency Integrated CircuitsCmos Analog Circuit DesignCmos Analog Integrated CircuitsCmos Radio-frequency CircuitsLow-power Sensor InterfacesPassive Rfid SystemsPower OutputRf Cmos DesignSensor Interface Design
This paper presents a highly efficient analog multistandard frontend for passive sensor-enabled RFID transponders. The CMOS only frontend is implemented in a 0.13 ¿m CMOS technology. The measured overall RF-to-DC power conversion efficiency of the analog frontend for a DC output power of 10 ¿W is about 7% and the maximum efficiency is about 15% at UHF. An implemented sensor interface consumes 1.4 ¿A at 1V supply. This interface contains an ultra low-power successive approximation ADC that uses the capacitive charge redistribution technique for its integrated DAC.
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