Brenkung Adder Design

Executive Summary common viper Design The objective of the project is to discard a 16-bit common viper. The remnant of the project is to minimize the fag out spell keeping military group within constraints, as well as minimizing the ara. The constraints are as follows: muscularity/operation has to be less , t trise han t0.5nJ and fare < 200ps, and use the precedent cell layout, which must heed each(prenominal) the design rules. Throughout the bleed there were several adder topologies with different advantages been introduced, and we at long last came to the finding to choose Brent-Kung adder architecture. The unwavering ground we chose this topology was because its carrying into action was simpler than Radix-4 Kogge-Stone head. As a result the layout of the tour of duty would be less complicated. tear down though it is a bit slow-moving than the Kogg-Stone, it would deliver us cartridge clip doing the layout in the end. After choosing the topology, we had to pursue up with the system of logic room to implement the bl We had implemented the logic blocks victimization transmission accesss to deliver the goods more speed. However, for simplicity in sizing the Motivations: Since we wanted the adder to operate as reason out as possible, we came up with nigh ideas to minimize the propagation stickup such as: we modify the Brent-Kung manoeuvre, added 3 more transit intersection points and cut the number of stages for the exact path from 7 to 5.

For the Brent-Kung tree in swan to recrudesce the carryout C14, the adder has to wait for the product of C7&C11, then C11&13 and finally C13&P14. On the other hoi polloi for the change Brent- Kung tree C7 is directly producted with C13 at the fourth stage. This helps the C14 to be available at the fifth stage. The modified Brent-Kung tree is shown below as well as the decisive path, which is highlighted in red. Loading survey: Rwire=Rsq*L/W=0.75*1.8mm / 4?=281.2Ohm Cin = 24.7fF(from the sum of all the doorway input capacitance of the very setoff stage.) Since the adder driving a 1.8mm long bus with 6 haemorrhoid evenly distributed. Each capacitive load is equal...If you want to go a full essay, holy order it on our website: Ordercustompaper.com

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