Importance

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Abstract

In a master-slave D flip-flop, the master latch has first and second three-state stages and a feedback stage for positive feedback from the data outputs of the first and second three-state stages to the data input of the second three-state stage. The slave latch has third and fourth three-state stages and a feedback stage for positive feedback from the data outputs of the third and fourth three-state stages to the data input of the fourth three-state stage. Clock signals are applied from a clock signal source to the clock inputs of a clock switch element in one of the three-state stages whose clock signal is shared with another of the three-state stages, reducing the number of clock switches and clock switch power consumption. Data inverters also may be shared between a three-state stage of the master latch and a three-state stage of the slave latch.

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First Claim