Single-Ended to Differential Converter with Gain of +2 and Common Mode Control

Because the gains of each channel of the LT6411 can be configured independently, the LT6411 can be used to provide a gain of +2 when amplifying differential signals and when converting single-ended signals to differential. With both channels connected to a single-ended input, one channel configured with a gain of +1 and the other configured with a gain of –1, the output will be a differential version of the input with twice the peak-to-peak (differential) amplitude. This configuration can preserve signal amplitude when converting single ended video signals to differential signals when driving double terminated cables. The 10k resistors in Figure 8 set the common mode voltage at the output.