A variable impedance load (104) is provided at the output of a radio frequency (RF) driver amplifier (102) having a variable gain. In an exemplary embodiment, the variable load (104) comprises a resistor (R) in series with a semiconductor device (M.sub.1). The semiconductor device (M.sub.1) has an impedance level determined by a drive current. The value of the drive current is related to the gain of the RF driver amplifier (102).