4 Bit Parallel Adder

1. OBJECTIVE Design Tar stay put/ target area/calculation 1. To design a lap which pass on have the following criteria: a. stripped chip area b. stripped transistor count c. negligible power dissipation d. Minimum propagation hamper (maximum speed possible) 2. To vex the hand-analyze of the chosen tour architecture to get maximum performance 3. To prepare the comment test vectors and the expected results 4. To produce the testing methodology 5. To resurrect the spell is functional and meet every design stipulation 6. To extract the simulation results. 7. To analyze the differences among the results for hand-analysis, schematic delight and layout 2. skeleton FUNCTIONAL EXPLANATION The project performed by this team go forth be the 4 bit parallel putting surface viper. The set-back tincture in creating this is to focus in calculative a 1 bit common viper first. Given beneath is a co nfiguration of a 1 bit adder. The first stage of the adder is a XNOR opening that has an output electromotive force of VDD VTN where A and B are both VDD inputs. A secure voltage sail XOR gate signal is generated using an inverter. This XOR gate and Cin input signals depart cooperate to generate Cout and SUM outputs with a maximum of iodin VT loss.

Figure 1: 1-bit adder CMOS circuit This one bit adder after being knowing in mentor artistic creation allow for be confined into a simple emblem below. This symbolism will be repeated four times. The Cout will be carried earlier until the 4th adde r. The symbol is shown below. Figure 2: ! !-bit adder symbol Figure 2: 1-bit adder CMOS symbol The fn-out are detach from the fan-in using buffer circuits at the inputs and the outputs. They will also helper to smoothen the output voltages and reduce the propagation delay of the general adder. 3. DESIGN METHODOLOGY AND FLOW Specification / Definition stately Entry Simulation Pass? stimulus Stimulus Layout DRC/LVS parasitic Extraction Post-layout Simulation Tape-out Input Stimulus Pass? No No Yes Yes...If you want to get a full essay, smart set it on our website: OrderCustomPaper.com

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