MMG20241H Driver/Pre-Driver Amplifier NXP Semiconductors MMG20241H Driver/Pre-Driver Amplifier is a 1/4W GaAs (Gallium Arsenide) Enhancement-Mode pHEMT (Pseudomorphic High Electron Mobility Transistor). The MMG20241H is designed as a driver or pre-driver for Doherty power amplifiers in wireless infrastructure equipment operating in the 450MHz to 3800MHz frequency range. Because of its versatile design, the device may also be used in a variety of general purpose amplifier applications, including frequencies below 450MHz and above 3800MHz.