• Charge transfer uses the electrical properties of the capacitor charge. It uses a sampling capacitor (Cs) in which the electrode charges are transferred to.

  • Charge transfer is performed through analog switches directly embedded into the GPIO pins of the MCU.

  • The charge transfer cycle is repeated N times (counts) until the voltage on the sampling capacitor reaches the Vih threshold. 

  • The number N of transfer cycles required to reach the threshold represents the size of Cx.

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