| 摘要 |
A video pre-amplifier includes an input stage and an output stage. In one embodiment, an on-screen display signal is provided to the output stage, and a control signal is asserted when the on-screen display signal is active. With respect to a video output signal, both the gains of the input stage and output stage are adjusted when the control signal is asserted. In one embodiment, the control signal is generated by a comparator within the output stage.
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