Nfc device having a differential input envelope detector
作者： Cristian Marcu , Jafar Savoj
DOI:
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摘要: A differential input envelope detector receives an unamplified Near Field Communication (NFC) signal from NFC antenna and downconverts intelligence to baseband. In one example, the includes modulated onto a carrier. The outputs downconverted output node in such way that fundamental odd harmonics of carrier are canceled on node. There is substantially no frequency present this facilitates filtering interference data recovery. An recovery circuit can be low power digital involving ultra-low ADC subsequent processing circuitry.
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