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Approximate parallel prefix adders are a type of circuit that can perform addition operations on binary numbers with high speed, low area, and less power. These circuits are designed to provide approximate results, which means that they sacrifice accuracy for efficiency. This trade-off makes them ideal for use in applications where speed is more important than precision. In recent years, there has been a growing interest in the improvement of these circuits, as they have the potential to revolutionize the field of digital signal processing. Kogge–Stone (KS) adder is a kind of parallel prefix adder that has the strong point of quickest addition primarily based on design time. Approximation Kogge–Stone (AxKS) adder is a variant of basic Kogge–Stone Adder that introduces a level of approximation in its operation. In this paper, a new approximate KS Adder is proposed with high-speed performance and less area. The KS Adder and its AxKS Adder are compared for bits 8, 16, 32 using software tool Xilinx Vivado.

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High-Speed Area Efficient Approximate Kogge–Stone Adder

  • 会议论文

  • 发表日期：

    2025年

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  • Sudhakar Reddy Dantla,
  • Prudhvi Tummala,
  • Sarada Musala,
  • Satish Kanapala

摘要

Approximate parallel prefix adders are a type of circuit that can perform addition operations on binary numbers with high speed, low area, and less power. These circuits are designed to provide approximate results, which means that they sacrifice accuracy for efficiency. This trade-off makes them ideal for use in applications where speed is more important than precision. In recent years, there has been a growing interest in the improvement of these circuits, as they have the potential to revolutionize the field of digital signal processing. Kogge–Stone (KS) adder is a kind of parallel prefix adder that has the strong point of quickest addition primarily based on design time. Approximation Kogge–Stone (AxKS) adder is a variant of basic Kogge–Stone Adder that introduces a level of approximation in its operation. In this paper, a new approximate KS Adder is proposed with high-speed performance and less area. The KS Adder and its AxKS Adder are compared for bits 8, 16, 32 using software tool Xilinx Vivado.