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Design of Low Power Dual Trigger Sequential Circuit

Keywords: CDMFF , CPSFF

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A large portion of the on chip power is consumed by the clock system which is made of the clockdistribution network and flip-flops. So the objective is to reduce the power consumption. Most of the on chippower is consumed by the clock system which is made of the clock distribution network and flip-flops. The“Conditional Data Mapping Flip Flop” (CDMFF) and “Clocked Pair Shared Implicit Pulsed Flip Flop”(CPSFF) are triggered using single edge of clock. In CPSFF, reducing capacity of the clock load byminimizing number of clocked transistor was elaborated. The drawbacks of single edge clocking system arehigh transistor count and floating node problem in critical path. Moreover it cannot be used in noiseintensive environment. The CDMFF and CPSFF are triggered using single edge clocking system. Here, thedesign of a Dual triggered CMOS circuit is proposed. The objective is to reduce the number of clockedtransistors and switching activities, thereby reducing the power dissipation. The proposed design isimplemented in Microwind 3.1 and simulated using DSCH. The frequency of the Dual triggered CMOScircuit is only half of the clock frequency of the single edge triggered CMOS circuit. Simulation analysisshows that the Dual triggered CMOS circuit reduces switching activities by about 40%, thus reducingdynamic power dissipation. Hence it is suitable for using in high performance and low power environments.


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