| 摘要 |
A system for automatically monitoring and controlling the blanking (black) current level of an image-reproducing kinescope has a cathode and grid-intensity control electrodes. When a cathode blanking current is monitored, a reference voltage is applied to the cathode over the entire monitoring interval, and an auxiliary voltage is applied to the grid electrode during a portion of the monitoring interval. A version of the grid voltage appears as an induced cathode output voltage that is proportional to the level of cathode-blanking current conduction.
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