Civil aviation aircraft L-band suppression receiving circuit based on optocoupler switch

The utility model discloses a civil aviation aircraft L wave band suppression receiving circuit based on an optocoupler switch, comprising a charging unit (1), a conduction unit (2) and an optocoupler switch (3), the charging unit (1) performs charging and turns on the conduction unit (2) after receiving an external suppression signal, the conduction unit (2) conducts the optocoupler switch (3) when the charging unit (1) performs charging, and the optocoupler switch (3) is switched on when the charging unit (1) performs charging. The optocoupler switch (3) emits a suppression signal, and the conduction unit (2) turns off the optocoupler switch (3) after the charging unit (1) completes charging. According to the embodiment of the invention, a correct suppression signal can be suppressed in a transmitting stage, a pulse signal is released in a non-transmitting stage, and deadlock suppression of an external circuit can be ensured not to be transmitted through the charging unit and the conduction unit. 本实用新型公开了一种