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A low-cost carry look-ahead adder for flying-adder frequency synthesizer | IEEE Conference Publication | IEEE Xplore

A low-cost carry look-ahead adder for flying-adder frequency synthesizer


Abstract:

This paper presents a compact and cost-effective carry look-ahead adder for fractional accumulator in flying-adder frequency synthesizer. The fractional accumulator desig...Show More

Abstract:

This paper presents a compact and cost-effective carry look-ahead adder for fractional accumulator in flying-adder frequency synthesizer. The fractional accumulator design is critical in flying-adder frequency synthesizer. Conventional carry look-ahead adder is replaced with a two-bit carry look-ahead adder and another D flip-flop to serve as basic module to construct the adder. The power consumption is approximately 59% of conventional approach. The proposed method eliminates the large gate area in conventional method that can greatly reduce the hardware cost. Measurements show that the output frequency error is less than 3 ppm.
Date of Conference: 27-29 May 2016
Date Added to IEEE Xplore: 28 July 2016
ISBN Information:
Conference Location: Nantou, Taiwan

References

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