A radio frequency (RF) power amplification circuit including a power
amplifier is provided for preventing breakdown of the power amplifier.
The power amplifier includes an input for receiving RF signals and an
output for providing amplified RF signals. The RF power amplification
circuit also includes a bias circuit coupled to the input of the power
amplifier to permit normal operation of the power amplifier when the base
current is below a predetermined current threshold and to prevent normal
operation of the power amplifier when the base current is above the
predetermined current threshold.