Robust High-Gain Amplifier Design Using Dynamical Systems and Bifurcation Theory With Digital Postprocessing Techniques

He C.; Jin L.; Chen D.; Geiger R.

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Robust High-Gain Amplifier Design Using Dynamical Systems and Bifurcation Theory With Digital Postprocessing Techniques

机译：利用动态系统和分叉理论以及数字后处理技术实现稳健的高增益放大器设计

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A CMOS differential positive feedback amplifier (PFA) and its inherent nonlinearity were analyzed. Based on nonlinear dynamical systems and bifurcation theory, we predicted bifurcation and hysteresis phenomena in the PFA. An algorithm, which can be implemented using simple digital logic, was developed to measure the PFA''s open-loop stability as the bifurcation parameter changes. Parameter-tuning algorithms were constructed that systematically move the amplifier''s operational point towards the bifurcation point, at which an infinite dc gain is achieved. In order to compensate for the PFA''s high sensitivity to process and temperature variations, flexible analog design integrating digital programmability and adaptive digital postprocessing techniques were developed. This flexibility and postprocessing capability could dramatically enhance the PFA''s yield. Full corner simulation results over wide temperature range verified the bifurcation phenomena and the effectiveness of the control algorithms. It is shown that this amplifier can maintain high performance in advanced digital CMOS technology at very low voltage supply. It is also demonstrated that the proposed approach offers a robust PFA design with both high yield and high performance

机译：分析了CMOS差分正反馈放大器（PFA）及其固有的非线性。基于非线性动力学系统和分叉理论，我们预测了PFA中的分叉和滞后现象。开发了可以使用简单数字逻辑实现的算法，以测量分叉参数变化时PFA的开环稳定性。构建了参数调谐算法，该算法将放大器的工作点系统地移向分叉点，在分叉点处获得无限的直流增益。为了补偿PFA对过程和温度变化的高度敏感性，开发了集成了数字可编程性和自适应数字后处理技术的灵活模拟设计。这种灵活性和后处理能力可以大大提高PFA的产量。在宽温度范围内的全角仿真结果验证了分叉现象和控制算法的有效性。结果表明，该放大器可以在非常低的电源电压下保持先进的数字CMOS技术的高性能。还证明了所提出的方法提供了高产量和高性能的可靠的PFA设计。

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《IEEE Transactions on Circuits and Systems. I, Regular Papers》 |2007年第5期|p.964-973|共10页
作者
He C.; Jin L.; Chen D.; Geiger R.;
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正文语种 eng
中图分类 TN71;
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CMOS digital integrated circuits; bifurcation; differential amplifiers; feedback amplifiers; stability; CMOS differential positive feedback amplifier; bifurcation theory; digital CMOS technology; digital logic; digital postprocessing techniques; dynamical systems;

机译：CMOS数字集成电路分叉差分放大器反馈放大器稳定性CMOS差分正反馈放大器分叉理论数字CMOS技术数字逻辑数字后处理技术动态系统;

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Robust High-Gain Amplifier Design Using Dynamical Systems and Bifurcation Theory With Digital Postprocessing Techniques

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