Compression control through amplitude adjustment of a radio frequency input signal. A power amplifier module can include a power amplifier. The power amplifier can include a cascode transistor pair. The cascode transistor pair can include a first transistor and a second transistor. The power amplifier module can include a power amplifier bias controller. The power amplifier bias controller can include a current comparator, a saturation controller, and a radio frequency (RF) attenuator. The current comparator can be configured to compare a first base current of the first transistor and a second base current of the second transistor to obtain a comparison value. The saturation controller can be configured to supply a reference signal to the RF attenuator based on the comparison value. The RF attenuator can be configured to modify the amplitude of an RF input signal supplied to the power amplifier based at least in part on the reference signal.