| 摘要 |
<p>Disclosed here is an automatic brightness limiter circuit in which a separate digital signal display from a personal computer is superposed on a television broadcast screen and displayed simultaneously. The beam current of the cathode ray tube is detected and if found to exceed a prescribed value, feedback is applied to the video amplifier circuit only of the television broadcast display. Feedback is not applied to the amplifier circuit of the digital signal display. The amplifier of this digital signal display is arranged so that independent limiting action is carried out corresponding to the amplitude of the digital signal. </p> |
