Video equipment using broadband signals must solve the problem of matching with coaxial cables, and several cables cannot be connected in parallel at one output.
For the signal distribution method, you can add several matching 75 ohm resistors at the output of the low output impedance amplifier or like this circuit, add a wide buffer amplifier for each channel.
Circuit working principleThis circuit uses the OP amplifier LM6361 for wideband video to perform inverse amplification. This amplifier can work stably even if the amplification factor is 1. The variable resistor VR1 of the amplifier A1 can be used to adjust the amplification factor between 1 and 3.5.
This paper address: http: //TIcle/88/130/167/2010/20100430216992.html
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