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介绍了一种基于能量恢复的单相功率时钟触发器。该触发器的输入信号和输出信号均为方波,因此可以直接与传统的组合逻辑级联。该触发器仅需要14个晶体管,远少于传统触发器中晶体管的数目。仿真结果显示,在0.18μm工艺下,电源电压为1.2 V,时钟频率为200 MHz,开关活动率为50%时,与传统的触发器相比该能量恢复触发器可以节省31%的功耗。为了验证该触发器的功能,在0.18μm工艺下进行了电路设计,测试结果显示该触发器还可以在低电压下正常工作。
A single phase power clock trigger based on energy recovery is introduced. The input and output signals of the flip-flop are square wave, so they can be directly cascaded with the traditional combinational logic. This flip-flop requires only 14 transistors, far less than the number of transistors in a conventional flip-flop. The simulation results show that the energy recovery flip-flop can save 31% power consumption compared with the conventional flip-flop when the power voltage is 1.2 V, the clock frequency is 200 MHz and the switching activity is 50% under the 0.18 μm process. In order to verify the function of the flip-flop, a circuit design was carried out in a 0.18μm process. The test results show that the flip-flop can also work under low voltage.