Abstract

This paper reviews the patented control method of preventing the electromangnetic interference from NFC antenna to touchpad sense lines efficirntly. The NFC antenna was integrated under the touchpad by implementing NFC_radio_active signal from the NFC module to the touchpad sensor controller IC. The conventional control method required fine-tuning of the touchpad sensor firmware was required to detect and learn the NFC antenna trace in order to prevent this electromagnetic interference.

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