NFC DEVICE DETECTION
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United States of America Patent
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Issued Date -
Jul 13, 2023
app pub date -
Jan 6, 2023
filing date -
Jan 10, 2022
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Abstract
A near-field communication circuit of a first NFC device alternates, in low power mode, between: first phases of emission of field bursts and second phases spanning an entire duration separating two successive first phases. Each second phase includes a field detector enabling phase. In one implementation, the field detector enabling phase extends all along a duration of the second phase. In an alternate implementation, the field detector enabling phase is interrupted by field detector disabling phases. Each field detector disabling phase has a duration shorter than a minimum duration of each first phase.
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