低速单元采用带有电平恢复的传输管逻辑实现，高速单元采用动态传输门逻辑实现。
Level restoration pass-transistor logic is proposed for low speed cell while dynamic transmission gate logic for high speed cell.
在过去的低速率的美好日子里，我们可以把数字信号想象成像直流信号一样，逻辑高时开，逻辑低时关。
In the good old days, we could think of digital signals as though they were DC signals that turned on and off with logic-highs and logic-lows.
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