An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications

Teng Chuan Cheng; Tsung Heng Tsai

doi:10.1109/BioCAS.2012.6418427

An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications

Teng Chuan Cheng^*, Tsung Heng Tsai

^*Corresponding author for this work

Institute of Pioneer Semiconductor Innovation

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

This paper proposed a new architecture to mitigate digital-to-analog converter (DAC) errors in a continuous-time ΔΣ modulator (CTSDM). The modulator adopted the 3^rd-order loop filter with dual-loop architecture. Digital integrator feedback (DIF) technique is proposed to tolerate more clock jitter and DAC errors. Multi-bit quantizer and non-return-to-zero (NRZ) DAC are utilized to reduce clock jitter sensitivity. The proposed design effectively addresses the noise introduced by the multi-bit DAC with the assistance of a simple digital first-order digital filter. The presented CTSDM achieves 79dB SNR, and 82dB dynamic range. This design is implemented in a TSMC 0.18μm CMOS process. The power consumption is only 2.5mW. Low power and wide bandwidth make this ADC suitable for portable medical ultrasonic applications.

Original language	English
Title of host publication	2012 IEEE Biomedical Circuits and Systems Conference
Subtitle of host publication	Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications
Pages	340-343
Number of pages	4
DOIs	https://doi.org/10.1109/BioCAS.2012.6418427
State	Published - 2012
Event	2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Hsinchu, Taiwan Duration: 28 Nov 2012 → 30 Nov 2012

Publication series

Name	2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications

Conference

Conference	2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012
Country/Territory	Taiwan
City	Hsinchu
Period	28/11/12 → 30/11/12

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10.1109/BioCAS.2012.6418427

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Cheng, T. C., & Tsai, T. H. (2012). An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications. In 2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications (pp. 340-343). [6418427] (2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications). https://doi.org/10.1109/BioCAS.2012.6418427

Cheng, Teng Chuan ; Tsai, Tsung Heng. / An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications. 2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications. 2012. pp. 340-343 (2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications).

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title = "An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications",

abstract = "This paper proposed a new architecture to mitigate digital-to-analog converter (DAC) errors in a continuous-time ΔΣ modulator (CTSDM). The modulator adopted the 3rd-order loop filter with dual-loop architecture. Digital integrator feedback (DIF) technique is proposed to tolerate more clock jitter and DAC errors. Multi-bit quantizer and non-return-to-zero (NRZ) DAC are utilized to reduce clock jitter sensitivity. The proposed design effectively addresses the noise introduced by the multi-bit DAC with the assistance of a simple digital first-order digital filter. The presented CTSDM achieves 79dB SNR, and 82dB dynamic range. This design is implemented in a TSMC 0.18μm CMOS process. The power consumption is only 2.5mW. Low power and wide bandwidth make this ADC suitable for portable medical ultrasonic applications.",

author = "Cheng, {Teng Chuan} and Tsai, {Tsung Heng}",

year = "2012",

doi = "10.1109/BioCAS.2012.6418427",

language = "English",

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series = "2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications",

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note = "null ; Conference date: 28-11-2012 Through 30-11-2012",

}

Cheng, TC & Tsai, TH 2012, An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications. in 2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications., 6418427, 2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications, pp. 340-343, 2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012, Hsinchu, Taiwan, 28/11/12. https://doi.org/10.1109/BioCAS.2012.6418427

An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications. / Cheng, Teng Chuan; Tsai, Tsung Heng.

2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications. 2012. p. 340-343 6418427 (2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Tsai, Tsung Heng

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N2 - This paper proposed a new architecture to mitigate digital-to-analog converter (DAC) errors in a continuous-time ΔΣ modulator (CTSDM). The modulator adopted the 3rd-order loop filter with dual-loop architecture. Digital integrator feedback (DIF) technique is proposed to tolerate more clock jitter and DAC errors. Multi-bit quantizer and non-return-to-zero (NRZ) DAC are utilized to reduce clock jitter sensitivity. The proposed design effectively addresses the noise introduced by the multi-bit DAC with the assistance of a simple digital first-order digital filter. The presented CTSDM achieves 79dB SNR, and 82dB dynamic range. This design is implemented in a TSMC 0.18μm CMOS process. The power consumption is only 2.5mW. Low power and wide bandwidth make this ADC suitable for portable medical ultrasonic applications.

AB - This paper proposed a new architecture to mitigate digital-to-analog converter (DAC) errors in a continuous-time ΔΣ modulator (CTSDM). The modulator adopted the 3rd-order loop filter with dual-loop architecture. Digital integrator feedback (DIF) technique is proposed to tolerate more clock jitter and DAC errors. Multi-bit quantizer and non-return-to-zero (NRZ) DAC are utilized to reduce clock jitter sensitivity. The proposed design effectively addresses the noise introduced by the multi-bit DAC with the assistance of a simple digital first-order digital filter. The presented CTSDM achieves 79dB SNR, and 82dB dynamic range. This design is implemented in a TSMC 0.18μm CMOS process. The power consumption is only 2.5mW. Low power and wide bandwidth make this ADC suitable for portable medical ultrasonic applications.

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M3 - Conference contribution

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Cheng TC, Tsai TH. An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications. In 2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications. 2012. p. 340-343. 6418427. (2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications). doi: 10.1109/BioCAS.2012.6418427

An 8-MHz bandwidth continuous-time ΔΣ modulator with DAC error sensitivity reduction for medical ultrasonic applications

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