Integrated circuits and transponder circuitry with improved ask demodulation
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United States of America Patent
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Sep 12, 2017
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app pub date -
Mar 15, 2017
filing date -
Mar 15, 2017
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Abstract
Disclosed examples include an RF transponder circuit with signal input nodes, a rectifier circuit with a power transistor and a current mirror circuit to generate a rectifier mirror current signal, a limiter circuit with a limiter transistor and a current mirror circuit to generate a limiter mirror current signal, and a demodulator circuit to demodulate an amplitude shift keying (ASK) RF signal received at the signal input nodes according to the rectifier and limiter mirror current signal to generate a binary demodulator data signal representing the presence or absence of a threshold amount of energy in the RF signal.
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