Self-adaptive video twisted-pair wire transmitter

The invention relates to a self-adaptive video twisted-pair wire transmitter. In the transmitter, a video coaxial cable signal is input from the bayonet nut connecter (BNC) of a socket Q9; a resistor R1 is a coaxial cable matching resistor; the video coaxial cable signal is coupled to the second pin of an EL5171 video operational amplification chip U4 by a capacitor C1, input into the video operational amplification chip U4 and converted into a differential signal and the differential signal is output; resistors R8 and R9 are U4 feedback resistors and form a video pre-compensation circuit together with resistors R11, R13 and R14 and capacitors C11 and C12; capacitors C4 and C5 are power supply decoupling capacitors; resistors R4, R5, R6 and R7 and suppression diodes V1, V2, V3 and V4 commonly form a two-stage lightning protection circuit; and the differential signal is output to a twisted-pair wire for transmission through a twisted-pair wire interface J2. The power supply for the transmitter is DC12V and can