| CPC H04B 5/72 (2024.01) [H04B 5/20 (2024.01); H04B 5/45 (2024.01); H04B 5/48 (2024.01)] | 16 Claims |
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1. A near field communication (NFC) device comprising:
a phase detector configured to receive a reference clock signal, detect a phase of the reference clock signal, output a generated clock signal having a frequency synchronized with the reference clock signal, and store phase information of the generated clock signal as a first digital code;
a phase delay calculator configured to
compare a phase of the generated clock signal with a reference phase to calculate a delta value while performing an active load modulation (ALM) operation, wherein the delta value corresponds to a phase difference between the phase of the generated clock signal and the reference phase, and
store the delta value as a second digital code; and
a transmission clock generator configured to reflect phase information stored as the first digital code and the second digital code to output a transmission clock signal.
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