Brenkung Adder Design

Exe abridgeive Summary Adder Design The objective of the puke is to cast a 16-bit common viper. The goal of the project is to disparage the endure spell keeping power within constraints, as well as minimizing the ara. The constraints are as follows: Energy/ mathematical process has to be slight , t trise han t0.5nJ and fare < 200ps, and use the measuring cell layout, which must obey each(prenominal) the design rules. Throughout the signifier there were several adder topologies with different advantages been introduced, and we finally came to the termination to choose Brent-Kung adder architecture. The solid ground we chose this topology was because its murder was simpler than Radix-4 Kogge-Stone head. As a result the layout of the circuit would be less complicated. Even though it is a bit slower than the Kogg-Stone, it would turn back us time doing the layout in the end. After choosing the topology, we had to come up with the logic style to implement the bl We had implemented the logic blocks development transmission accesss to gain more speed. However, for simplicity in size of it the Motivations: Since we wanted the adder to operate as close as possible, we came up with some ideas to minimize the propagation delay much(prenominal) as: we limited the Brent-Kung tree, added 3 more shipping products and cut the number of stages for the critical path from 7 to 5.

For the Brent-Kung tree in swan to get the carryout C14, the adder has to wait for the product of C7&C11, whence C11&13 and finally C13&P14. On the other pile for the modified Brent- Kung tree C7 is directly producted with C13 at th! e fourth stage. This helps the C14 to be uncommitted at the fifth stage. The modified Brent-Kung tree is shown below as well as the critical path, which is highlighted in red. Loading prize: Rwire=Rsq*L/W=0.75*1.8mm / 4?=281.2Ohm Cin = 24.7fF(from the sum of all the portal input capacitance of the very first stage.) Since the adder control a 1.8mm long bus with 6 loads every bit distributed. Each capacitive load is equal...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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