| 摘要 |
A voltage sensing circuit ( 230 ) for sensing voltage signals of input alternating current (AC) signals includes a plurality of voltage dividing circuits ( 23 n (n=1, 2, 3, . . . , n)) and a charging circuit ( 232 ). The voltage dividing circuits are used for dividing voltage signals of the input AC signals. The voltage dividing circuits are connected to the charging circuit, and then the divided voltage signals can be transmitted between the voltage dividing circuits, thereby pulling high corresponding DC levels of the divided voltage signals.
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