低功耗块驱动运算跨导放大器的设计与分析:一种自级联码部分正反馈方法

Q4 Engineering

International Journal of High Speed Electronics and Systems Pub Date : 2023-03-01 DOI:10.1142/s0129156423500027

K. Sharma, Aveksha Sharma, R. Pandey, Jaya Madan

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引用次数: 0

摘要

由于体积驱动(BD)运算跨导放大器(OTA)固有的低跨导和高噪声，实现低功耗的高增益和低噪声是一项具有挑战性的任务。本文报道了一种基于自级联码部分正反馈(SCPPF)方法的BD OTA，并将其结果与常规的单MOS部分正反馈(PPF)方法进行了比较。在输入参考噪声为1.11 μV/√Hz，频率为10 Hz，电源电压为±0.5 V的情况下，与常规的BD PPF OTA相比，本文提出的BD SCPPF OTA的增益为68.71 dB，增益带宽为39.4 kHz，功耗为630 nW，输出阻抗为0.4 MΩ，共模抑制比为134.4 dB。BD SCPPF OTA消耗面积为0.0523 mm2。提出的BD SCPPF OTA可用于提高生物医学模拟前端传感和信号处理系统的性能。

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Design and Analysis of Low-Power Bulk-Driven Operational Transconductance Amplifier: A Self-Cascode Partial Positive Feedback Approach

Achieving high-gain and low-noise operation of bulk-driven (BD) operational transconductance amplifier (OTA) with low-power consumption is a challenging task owing to inherent low transconductance and high noise in BD MOSFET. In this paper, we report a self-cascode partial positive feedback (SCPPF) approach-based BD OTA and have fairly compared the results with regular single MOS partial positive feedback (PPF) approach-based BD OTA. In comparison to regular BD PPF OTA, the proposed BD SCPPF OTA yields an improved gain of 68.71 dB, gain-bandwidth of 39.4 kHz, power consumption of 630 nW, output impedance of 0.4 MΩ and common mode rejection ratio of 134.4 dB for same input referred noise of 1.11 μV/√ Hz at frequency of 10 Hz and supply voltage of ±0.5 V. The area consumed by BD SCPPF OTA is 0.0523 mm2. The proposed BD SCPPF OTA can be possibly used to improve the performance of biomedical analog front-end sensing and signal processing systems.

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来源期刊

International Journal of High Speed Electronics and Systems Engineering-Electrical and Electronic Engineering

CiteScore

0.60

自引率

0.00%

发文量

期刊介绍： Launched in 1990, the International Journal of High Speed Electronics and Systems (IJHSES) has served graduate students and those in R&D, managerial and marketing positions by giving state-of-the-art data, and the latest research trends. Its main charter is to promote engineering education by advancing interdisciplinary science between electronics and systems and to explore high speed technology in photonics and electronics. IJHSES, a quarterly journal, continues to feature a broad coverage of topics relating to high speed or high performance devices, circuits and systems.