10.1.1 PLC Signal Adaptation

The reception path implements several stages to adapt the received signal to avoid saturation of the Analog-to-Digital Converter (ADC) and maximize the dynamic range. The AGC stage uses an external resistor to attenuate the input signal if needed. The PL460 provides a control signal to configure the resistor dynamically in function of the level of signal measured.

The PL460 also implements a PGA that adds five levels of gain to adjust the input signal to the ADC.

Finally, the DC blocker module is capable to detect and subtract any DC offset to prevent it from affecting the signal processing of the obtained samples.