A baseband amplifier circuit comprising a single-ended to differential converter followed by at least one boosted follower amplifier. The boosted follower amplifier comprises a first transconductance device arranged to control a first current between a first supply node and a first output node in response to a voltage at a first input node, a second transconductance device arranged to control a second current between the first output node and a second supply node in response to a voltage at a second input node, a third transconductance device arranged to control a third current between the first supply node and a second output node in response to a voltage at a third input node, and a fourth transconductance device arranged to control a fourth current between the second output node of the boosted follower amplifier and the second supply node in response to a voltage at a fourth input node.