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A low distortion CMOS analogue switch with high-order compensation

Published: 01 February 2015 Publication History
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  • Abstract

    A novel bootstrapped analogue switch with high-order harmonic distortion compensation applied in the multiply digital-to-analog convertor (MDAC) of high-speed and high-resolution pipelined analog-to-digital convertor is presented. To diminish inherent harmonic distortion introduced by the bootstrapped switch, the auxiliary circuit is adopted to achieve high-order compensation. Under the appropriate design, harmonic distortion introduced by the auxiliary circuit and that introduced by the bootstrapped switch can cancel out with each other. A 1.5 bit MDAC circuit based on the proposed switch has been fabricated in SMIC 0.18 μm CMOS process. In 10 MHz input with 100 MHz sample frequency, the signal-to-noise and distortion ratio of 102.72 dB, spurious-free dynamic range of 107.7 dB and total harmonic distortion of 106.1 dB have been measured.

    References

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    Agarwal, H., & Rana, A. (2012). Front end track and hold circuit for high speed analog to digital converters. In Proceedings of 2nd Conference on Communication Systems and Network Technologies, Yichang, pp. 1545---1547.
    [2]
    Hu, R. & Tang, J. (2012). A novel bootstrapped switch. In Electronics, Communications and Networks, 2012 2nd International Conference on Consumer (pp. 1545---1547).
    [3]
    Abo, A. M., & Gray, P. R. (1999). A 1.5-V 10-bit 14.3-MS/s CMOS pipeline analog-to-digital converter. IEEE Journal of Solid-State Circuits,34(5), 599---606.
    [4]
    Zhu, Z., Yu, G., Wang, J., & Yang, Y. (2013). A low distortion bootstrapped switch for 4-bit MDAC. Journal of Circuits, Systems and Computers.
    [5]
    Yang, C. Y., & Hung, C. C. (2005). A low-voltage low-distortion MOS sampling switch. IEEE International Symposium on Circuits and Systems,4, 3131---3134.

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          Published In

          cover image Analog Integrated Circuits and Signal Processing
          Analog Integrated Circuits and Signal Processing  Volume 82, Issue 2
          February 2015
          139 pages

          Publisher

          Kluwer Academic Publishers

          United States

          Publication History

          Published: 01 February 2015

          Author Tags

          1. Bootstrapped switch
          2. Harmonic distortion
          3. High-order compensation
          4. MDAC

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