Constant current protection-based emitter coupled asymmetric logic protection triggering system

The invention discloses a constant current protection-based emitter coupled asymmetric logic protection triggering system, which is composed of an emitter coupled asymmetric circuit, a passive pi type filter circuit, a light beam excitation type logic amplifying circuit, which is connected between the emitter coupled asymmetric circuit and the passive pi type filter circuit in series, wherein a constant current protection circuit is connected between the emitter coupled asymmetric circuit and the light beam excitation type logic amplifying circuit in series. Because the constant current protection circuit is arranged, the performance of the constant current protection-based emitter coupled asymmetric logic protection triggering system of the invention is more stable, and the current break could be effectively prevented.