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发明授权
CN104426522B 同步信号的DC恢复 有权

同步信号的DC恢复
摘要：
在一个实例实施方式中，本发明公开了一种用于恢复同步信号的DC分量的直流(DC)恢复电路，所述同步信号在发送电路和接收电路之间的电流(AC)耦合链路上提供。在同步信号的非活动期间，同步信号可经历向着公共模态的偏移，并可影响同步信号正确触发接收电路的能力。DC恢复电路经配置以在非活动期间保持同步信号稳定，并使得同步信号的AC分量在活动期间通过到接收电路，以减轻同步信号中基线偏移的问题。
摘要（英）：

In one example implementation, the present disclosure provides a direct current (DC) restoration circuit for restoring the DC component of a synchronization signal provided over an alternating current (AC) coupled link from a transmitting circuit to a receiving circuit. During a period of inactivity in the synchronization signal, the synchronization signal may experience a drift towards the common mode, and may affect the ability for the synchronization signal to properly trigger the receiving circuit. The DC restoration circuit is configured to hold the synchronization signal steady during the period of inactivity, and allow the AC component of the synchronization signal pass through to the receiving circuit during the period of activity to alleviate the problem of baseline drift in the synchronization signal.

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