Strong anti-interference communication port circuit

The invention relates to a communication port circuit, in particular to a strong anti-interference communication port circuit. The device comprises an input port and an output port. The input port is adaptively connected with the input end of the trigger device, the output end of the trigger device is adaptively connected with a filter shaping device, and the output end of the filter shaping device is adaptively connected with the output port. The circuit is characterized in that the output end of the trigger device is connected with the phase inverter INV4, the filter shaping device comprises a gate circuit AND2, a phase inverter INV5, a resistor R2, a capacitor C1, a phase inverter INV6, a gate circuit NOR21, a gate circuit NOR22 and a gate circuit NOR23, and the gate circuit AND2, the phase inverter INV5, the resistor R2, the capacitor C1, the phase inverter INV6, the gate circuit NOR21, the gate circuit NOR22 and the gate circuit NOR23 form a loop. By adopting the communication port circuit, the pulse wid