6.4.4 Transmit Signal Generation

The Tx signal generation block provides five bandwidth limited square wave signals for the transmit electrode. The five Tx signals are combined through a resistive network to provide a single Tx signal to the Tx electrode. This provides slew control to the rising and falling Tx signal edges in order to reduce radiated emissions. Frequency hopping automatically adjusts the Tx carrier frequency choosing one of the five transmit frequencies, depending on the environmental noise conditions. GestIC Library automatically selects the lowest noise working frequency in case the sensor signal is compromised. Frequencies can be enabled/disabled via the GestIC Library.