In order to improve the reliability and performance of the aircraft brake controller, according to the circuit structure of the brake controller, the brake command sensor excitation circuit and the electro-hydraulic servo valve control circuit based on PWM technology are proposed, combined with FPGA to complete the excitation signal and control signal output. Through analysis, simulation and experimental verification, the feasibility and stability of the proposed circuit are proved. The theoretical calculation shows that the reliability of the circuit has been significantly improved. And the circuit failure rate, power consumption, weight, area, and pad count are significantly reduced. Furthermore, the reliability and performance of the brake controller are improved.