Abstract
Abstract: Quantum-dot Cellular Automata (QCA) technology is a promising alternative to traditional complementary metaloxide-semiconductor (CMOS) technology for implementing digital circuits due to its potential for high speed, low power consumption, and small size. In this paper, we present a design for a Binary Coded Decimal (BCD) adder using QCA technology. The BCD adder is a crucial building block for arithmetic operations in decimal representation. The proposed design uses QCA cells to perform the addition operation of two BCD digits, which are encoded as a 4-bit binary number. The design includes a full-adder circuit, a BCD-to-binary converter, and a carry-lookahead adder. Simulation results using QCA Designer software demonstrate the functionality and feasibility of the proposed BCD adder design. The proposed design provides a promising alternative to traditional CMOS-based BCD adders and can contribute to the development of QCA-based digital circuits
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