WE PROPOSE TO DESIGN BUILD AND DEMONSTRATE THE PERFORMANCE OF A LOW POWER FPGA-BASED READOUT ELECTRONICS SYSTEM FOR USE WITH ARRAYS OF SUPERCONDUCTING DETECTORS SUCH AS TRANSITION EDGE SENSORS (TES) AND KINETIC INDUCTANCE DETECTORS (KIDS). FUTURE SPACE ASTROPHYSICS MISSIONS SUCH AS PICO THE GALAXY EVOLUTION PROBE THE COSMIC DAWN INTENSITY MAPPER AND THE FAR-INFRARED EXPLORER WILL REQUIRE ARRAYS OF THOUSANDS OF SUPERCONDUCTING DETECTORS. THE COMPLEXITY OF THE INSTRUMENT CAN BE REDUCED BY IMPLEMENTING A MULTIPLEXING READOUT ELECTRONICS SYSTEM WITH HIGH MULTIPLEX FACTOR. CURRENT SUPERCONDUCTING ARRAYS IN OPERATION ON GROUND-BASED AND BALLOON-BORNE INSTRUMENTS USE EITHER TIME-DOMAIN MULTIPLEXING (TDM) OR FREQUENCY-DOMAIN MULTIPLEXING (FDM) AT MHZ FREQUENCIES WITH MULTIPLEX RATIOS OF TENS-HUNDREDS. ONE WAY TO INCREASE THE MULTIPLEX FACTOR TO 1000'S OF DETECTORS IS TO INCREASE THE BANDWIDTH OF FDM BY USING GHZ FREQUENCIES - THIS TECHNIQUE IS CALLED MICROWAVE MULTIPLEXING.