DC to 65GHz Broadband MMIC Low-Noise Amplifier with PLFX. The MMA036AA is a seven stage traveling wave amplifier. The amplifier features Microsemi PLFX (Passive Low Frequency eXtension) circuitry designed to reduce the integration cost of the amplifier. PLFX isolates the amplifier from bias inductor resonances, allowing use of a less-expensive coil.