Rotating speed signal conditioning and isolation module

The invention relates to the technical field of aero-engine rotating speed measurement, and discloses a rotating speed signal conditioning and isolation module. The module comprises a power supply, a thunder-proof circuit, a hysteresis comparison circuit and an isolation circuit, wherein the thunder-proof circuit, the hysteresis comparison circuit and the isolation circuit are connected in sequence. The input end of the thunder-proof circuit is used for being connected with external sensor signals, the output end of the isolation circuit is used for being connected with an engine control system, and the power supply supplies power to the thunder-proof circuit, the hysteresis comparison circuit and the isolation circuit. The rotating speed signal conditioning and isolation module comprises the thunder-proof circuit, the hysteresis comparison circuit and the isolation circuit, is applied between an aero-engine rotating speed sensor and the engine control system, and achieves the effects of sensor signal conditioning and isolation and thunder protection.