A power amplifier module for an RF communications circuit , the module comprising: a driver stage amplifier having an input that is configured to receive an RF signal (RFIN_A), the driver stage amplifier being configured to be powered by a supply voltage (Vcc1; 21) configured to be applied across the driver stage amplifier to amplify the RF signal; a final stage amplifier that is configured to receive an amplified RF signal from an output of the driver stage amplifier , that is configured to be powered by a supply voltage (Vcc2) configured to be applied across the final stage amplifier , and that is configured to provide an amplified output signal (RFOUT); a bias voltage configured to power a bias network which is configured to apply a bias current to the input of the final stage amplifier through the input of the driver stage amplifier , the bias current being further applied to power the driver stage amplifier ; an interconnect implementing a current re-use function by providing a path from the bias voltage through the driver stage amplifier to the input of the final stage amplifier so that the current that flows through the driver stage amplifier is reduced, the interconnect including an AC path to ground via a diode coupled in parallel to a capacitor to ensure that the driver stage amplifier appears as an emitter follower at DC level driving a base of the final stage amplifier , the interconnect being configured to connect the base of the final stage amplifier with an emitter of the driver stage amplifier ; and an envelope tracking module that is configured to provide the power supply voltage (Vcc1; Vcc2) to at least one of the driver stage amplifier and the final stage amplifier . a driver stage amplifier having an input that is configured to receive an RF signal (RFIN_A), the driver stage amplifier being configured to be powered by a supply voltage (Vcc1; 21) configured to be applied across the driver stage amplifier to amplify the RF signal; a final stage amplifier that is configured to receive an amplified RF signal from an output of the driver stage amplifier , that is configured to be powered by a supply voltage (Vcc2) configured to be applied across the final stage amplifier , and that is configured to provide an amplified output signal (RFOUT); a bias voltage configured to power a bias network which is configured to apply a bias current to the input of the final stage amplifier through the input of the driver stage amplifier , the bias current being further applied to power the driver stage amplifier ; an interconnect implementing a current re-use function by providing a path from the bias voltage through the driver stage amplifier to the input of the final stage amplifier so that the current that flows through the driver stage amplifier is reduced, the interconnect including an AC path to ground via a diode coupled in parallel to a capacitor to ensure that the driver stage amplifier appears as an emitter follower at DC level driving a base of the final stage amplifier , the interconnect being configured to connect the base of the final stage amplifier with an emitter of the driver stage amplifier ; and an envelope tracking module that is configured to provide the power supply voltage (Vcc1; Vcc2) to at least one of the driver stage amplifier and the final stage amplifier . <EOS>