| 摘要 |
<p>A wideband video signal processor includes a kinescope driver stage (32) which is AC coupled (40) to the kinescope, and an automatic kinescope bias (AKB) control system. During AKB operating intervals, the kinescope is energized (G min ) so as to produce a cathode output pulse (RS) with a magnitude related to the level of black current conducted by kinescope. Brightness control is achieved by coupling a brightness control voltage (VB) to a signal path which conveys the cathode output pulse to AKB signal processing circuits in a bias control unit (50).</p> |
