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首页> 外文期刊>IEEE Journal of Solid-State Circuits >Inverter-Based Subthreshold Amplifier Techniques and Their Application in 0.3-V $DeltaSigma$ -Modulators
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Inverter-Based Subthreshold Amplifier Techniques and Their Application in 0.3-V $DeltaSigma$ -Modulators

机译：基于逆变器的亚阈值放大器技术及其在0.3V内联式中的应用 $ Delta Sigma $ -调制器

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摘要

Subthreshold amplifiers suffer from the limited voltage headroom which leaves little space for conventional analog techniques to enhance performance and efficiency. This paper presents an evolution process of implementing conventional structures with inverters, allowing ultralow-voltage operation with increased flexibility in adopting traditional circuit techniques. Based on the proposed inverter -based elementary structure and CMFB, both the Miller -compensated (MC) operational transconductance amplifier (OTA) and the feedforward-compensated (FFC) OTA achieve significantly improved performance as compared to previous works. The proposed amplifier techniques are verified in AI modulator (DSM) design, with MC-OTA for a DT-DSM and FFC-OTA for a CT-DSM, both fabricated in a 0.13 -gm CMOS. The 0.3-V DT-DSM achieves 74.1 -dB SNDR, 83.4 -dB SFDR and 20 -kHz bandwidth with 79.3-p.W power, resulting in a Schreier figure of merit (F'oM) of 158 dB. The 0.3-V CT-DSM achieves 68.5 -dB SNDR, 82.6 -dB SFDR, and 50 -kHz bandwidth with 26.3-p.W power, leading to a Schreier FoM of 161 dB. Both DSMs exhibit highly competitive performance among sub -0.5-V designs, validating the proposed subthreshold amplifier techniques.
机译：亚阈值放大器的电压裕量有限，为传统的模拟技术留出了很少的空间来提高性能和效率。本文介绍了使用逆变器实现传统结构的演进过程，允许采用超低压操作并采用传统电路技术时具有更大的灵活性。基于拟议的基于逆变器的基本结构和CMFB，与先前的工作相比，米勒补偿（MC）运算跨导放大器（OTA）和前馈补偿（FFC）OTA均可显着提高性能。拟议的放大器技术已在AI调制器（DSM）设计中得到验证，其中DT-DSM的MC-OTA和CT-DSM的FFC-OTA均以0.13 gm CMOS制成。 0.3V DT-DSM以79.3p.W的功率实现了74.1 dB的SNDR，83.4 dB的SFDR和20 kHz带宽，从而产生了158 dB的Schreier品质因数（F'oM）。 0.3V CT-DSM以26.3p.W的功率实现了68.5 dB的SNDR，82.6 dB的SFDR和50 kHz带宽，从而实现了161 dB的Schreier FoM。两种DSM均在-0.5V以下设计中表现出极具竞争力的性能，从而验证了拟议的亚阈值放大器技术。

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  • 来源
    《IEEE Journal of Solid-State Circuits》 |2019年第5期|1436-1445|共10页
  • 作者

    Lv Lishan; Zhou Xiong; Qiao Zhiliang; Li Qiang;

  • 作者单位

    Univ Elect Sci & Technol China, Inst Integrated Circuits & Syst, Chengdu 610054, Sichuan, Peoples R China;

    Univ Elect Sci & Technol China, Inst Integrated Circuits & Syst, Chengdu 610054, Sichuan, Peoples R China;

    Univ Elect Sci & Technol China, Inst Integrated Circuits & Syst, Chengdu 610054, Sichuan, Peoples R China|Univ Twente, IC Design Grp, NL-7500 Enschede, Netherlands;

    Univ Elect Sci & Technol China, Inst Integrated Circuits & Syst, Chengdu 610054, Sichuan, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Amplifiers; delta-sigma modulators; feedforward; frequency compensation; inverter-based; OTA; subthreshold; ultralow voltage;

    机译：放大器;Delta-Sigma调制器;馈电;频率补偿;基于逆变器;OTA;亚阈值;超级电压;

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