Lightning protection circuit for airborne interface

• Main Authors: WANG JIAN, WANG JINGANG, GUO XIAOHONG, QIAO JINTAO, ZHANG GUANGPU
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2024
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention discloses an airborne interface lightning protection circuit. Comprising a discrete magnitude signal lightning protection circuit, and the discrete magnitude signal lightning protection circuit comprises a rectifier diode D1, a rectifier diode D2, a capacitor C1, a resistor R1 and an optocoupler OP1. The rectifier diodes D1 and D2 share a cathode and are jointly connected to a discrete magnitude ground switch signal output end; the anode of the rectifier diode D1 is connected with a product ground GND through a capacitor C1, and is pulled up to VCC through a resistor R1, so as to provide a path for collecting a ground opening discrete magnitude state signal; the anode of the rectifier diode D2 is directly grounded GND; the anode of the light-emitting tube of the optocoupler OP1 is connected to VCC through a pull-up resistor R1, and the cathode of the light-emitting tube of the optocoupler OP1 is And two pins of the optical coupler OP1 switch tube are connected to the control chip through the pos