| 摘要 |
An output circuit including a fine-adjustment VGA and a rough-adjustment VGA, where the maximum gain of the fine-adjustment VGA, as attained when the minimum gain of the rough-adjustment VGA is attained, is lower than the maximum gain of the fine-adjustment VGA as attained when the maximum gain of the rough-adjustment VGA is attained, so that the power consumption of the rough-adjustment VGA is reduced
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