Sampling to obtain signal from RFID card

Communications: electrical – Selective – Interrogation response

Reexamination Certificate

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Details

C455S501000, C455S063100, C455S296000, C375S346000

Reexamination Certificate

active

07932813

ABSTRACT:
A radio frequency identification (RFID) reader of an apparatus in an example employs substantially synchronized sampling to obtain a signal from an RFID card notwithstanding employment by the RFID card of any of amplitude shift keying (ASK), frequency shift keying (FSK), or phase shift keying (PSK). The RFID reader decodes the signal notwithstanding the employment by the RFID card of any of ASK, FSK, or PSK.

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Shen et al. ISSC C96/Session 3/Communications Building Blocks/Paper TP 3.4: “A 900 MHz Integrated Discrete-Time Filtering RF Front-End”, Feb. 8, 1996.
“A 900 MHz RF Front End with Integrated Discrete Time Filtering”, Shen et. al., IEEE Journal of Solid State Circuits, vol. 31, No. 12, Dec. 1996.
Author Unknown,Phase-shift keying“http://en.wikipedia.org/wiki/Phaseshift—keying” From Wikipedia, the fee encyclopedia.
Author Unknown,Q Factor, “http://en.wikipedia.org/wiki/QFactor” From Wikipedia, the free encyclopedia.
Author Unknown,Radio Frequency Identification“http://en.wikipedia.org/wiki/Rfid” From Wikipedia, the free encyclopedia.
Author Unknown,Amplitude-shift keying“http://en.wikipedia.org/wiki/Amplitudeshift—keying” From Wikipedia, the free encyclopedia.
Author Unknown,Counter, “http://en.wikipedia.org/wiki/Counter” From Wikipedia, the free encyclopedia.
Author Unknown,Frequency-shift keying“http://en.wikipedia.org/wiki/Frequencyshift—keying” From Wikipedia, the free encyclopedia.
Author Unknown,Modulation“http://en.wikipedia.org/wiki/Modulation” From Wikipedia, the free encyclopedia.

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