Amplifier circuit (100) comprising: a
gain control (101); a first
amplifier (103); a second
amplifier (105) comprising a plurality of
gain stages (401a-401c); wherein the plurality of amplification stages (401a-401c) are connected in series between an input (119) and an output (121) of the second
amplifier (105), and each amplification stage (401a-401c) comprises a plurality of amplification units (401a-1 -401a-2; 401b-1 -401b-4; 401c-1 -401c-4) connected in parallel between an input and an output of the amplification stage; a digital-to-analog converter (201) connected between an output of the first amplifier (103) and an input of the second amplifier (105); and a power to
gain mapper (203) configured to receive a
power control value indicative of a desired power of an output
signal at an output of the amplifier circuit (100); wherein the power-to-gain mapper (203) comprises an amplifier circuit-specific calibration pair consisting of a reference gain value and a resulting reference output power of the amplifier circuit (100); and wherein the power to gain mapper (203) is configured to provide a target gain value based on the received
power control value and the calibration pair; wherein the gain controller (101) is designed to receive the desired gain value and, on the basis of the received desired gain value, to supply a gain adjustment
signal to the first amplifier (103) and, on the basis of the received desired gain value, to provide for each
gain stage of the second amplifier (105) an associated switching code which specifies the gain units of the
gain stage to be activated in order to activate a specific combination of gain units (401a-1 - 401a-2; 401b-1 - 401b-4; 401c-1 - 401c-4) of the second amplifier (105), such that a combined gain of the first amplifier (103) and the active gain units (401a-1 - 401a-2; 401b-1 - 401b-4; 401c-1 - 401c-4) of the second amplifier (105) corresponds to the received target gain value; wherein the gain controller (101) comprises a discontinuity compensation
lookup table (252) in which a discontinuity compensation value is provided for each desired gain value; and wherein the gain controller (101) is further configured to derive the gain adjustment
signal in dependence on the discontinuity compensation value provided in the discontinuity compensation
lookup table (252) for the desired gain value.