| 摘要 |
The circuit for protecting the fluctuation of TV image derived from the level changing of the brightness by generating the DC voltage for the contrast control compounding the output of the automatic bright limiter (ABL) and the signal changing of the brightness includes a volume (VR2) for varying the contrast controlling DC voltage of the contrast part (3), a transistor (Q3) for inverting and amplifying the brightness signal of the brightness processor (2), transistors (Q1) (Q2), a volume (VR1) for receiving the ABL current from the FBT (1) and applying it to the base of the Q1 and Q2, and the contrast part (3).
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