A novel design of a hybrid Full Adder (FA) using Pass Transistors (PTs), Transmission Gates (TGs) and Conventional Complementary Metal Oxide Semiconductor (CCMOS) logic is presented. Performance analysis of the circuit has been conducted using Cadence toolset. For comparative analysis, the performance parameters have been compared with twenty existing FA circuits. The proposed FA has also been extended up to a word length of 64 bits in order to test its scalability. Only the proposed FA and five of the existing designs have the ability to operate without utilizing buffer in intermediate stages while extended to 64 bits. According to simulation results, the proposed design demonstrates notable performance in power consumption and delay which accounted for low power delay product. Based on the simulation results, it can be stated that the proposed hybrid FA circuit is an attractive alternative in the data path design of modern high-speed Central Processing Units.
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Design of a Scalable Low-Power 1-Bit Hybrid Full Adder for Fast Computation