| 摘要 |
A gamma corrector for a video signal includes a first amplifier, a nonlinear signal translating stage and a second amplifier coupled in cascade in the order named. A feedback network coupled between the output of the second amplifier and a gain-control input of the first amplifier derives a gain-control signal indicative of the white level of the video signal produced at the output of the second amplifier. A gamma control signal is applied to a gain control input of the second amplifier in one embodiment and to a black level clamp associated with the first amplifier stage in another embodiment.
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