Aviation piston engine ignition drive circuit's anti -interference structure

The utility model provides an aviation piston engine ignition drive circuit's anti -interference structure, includes: signal amplifier, operational amplifier, comparator, singlechip port and hardware shutoff control end, wherein signal amplifier be connected with operational amplifier and the access point fireflood move the port, singlechip port and comparator are connected respectively to operational amplifier's output, the output of comparator is connected with hardware shutoff control end. The ignition drive square wave that the comparator was put after the processing fortune is compared with the comparative voltage square wave, drive square signal normally then keep igniteing drive square signal and export the singlechip port to if ignite, if ignite drive square signal abnormally then comparator output turn -offs the signal, hardware turn -offs control end work to the input of port is moved in the cut -off point fireflood, uses the ignition drive current who guarantees the input all the time as safe current, has avoided non - normal current's influence, thereby has guaranteed ignition coil's normal work.