Abstract: A power amplifier linearizer (12) includes an on-chip portion (60) and an external controller (22). The on-chip portion (60) implements two predistortion circuits (86, 88) desirably configured as look-up tables. One predistortion circuit (88) is programmed by the external controller (22) to apply a hotter linearizing translation function (54) and the other predistortion circuit (86) is programmed by the external controller (22) to apply a colder linearizing translation function (56). One or more temperature signals (24, 38) are correlated with the temperatures experienced by a power amplifier (34) and drive a power amplifier thermal modeler (50) implemented in the controller (22). As a result of running the thermal modeler (50), the controller (22) generates an interpolation signal (26) that indicates how far to interpolate between the hotter and colder translation functions (54, 56).