| 摘要 |
The circuit includes a key input means(10) for reading focus moving key to move focus zone, a key detecting means(20) for generating screen address value by key input, a screen dividing means(30) for comparing output address values and generating control signal,an integrating means(60) for integrating image signal and generating a reference voltage by using control signal, and a focus mycom(70) for moving focus zone when reference voltage has maximum value.
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