Good bosses, want to do the following 2 mouth VGA video switching circuit diagram, why you would have a VGA input port of the RGB through a 75 ohm resistance grounding? This is done to avoid what? Can't you pick up on the analog switch directly, is there any negative impact?

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When high frequency distribution parameters must be considered, need impedance matching, only the matching system can obtain the effective transmission of energy, can not generate a standing wave, distortion of signal will not...