Externally Linear Low-Power Analog Signal Processing Circuits

外部线性低功耗模拟信号处理电路

• 批准号: 0209109
• 负责人: Yannis Tsividis
• 金额: $ 30万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0209109&HistoricalAwards=false
• 关键词: Externally; Linear; Low; Power; Analog

ABSTRACT0209109Columbia UYannis TsividisThis research explores the possibilities of performing linear analog signal processing using systems which are internally nonlinear. The context is fully integrated systems, fabricated on a single silicon chip, containing a digital signal processor or a computer plus an analog signal processor; the latter is often a necessary part of the interface to the physical world. Conventional linear techniques for implementing analog processors often result in very large energy consumption, which rules them out in many practical cases. We are investigating the use of internally nonlinear processors to bypass those limitations. The applications of this work extend from wireless communications and computer hardware to consumer products to biomedical intrumentation.The use of input-output linear signal processors which are permitted to be internally nonlinear allows the internal signals to have, for a large input signal range, a magnitude well above that of noise and interference, while at the same time remaining safely below overload levels. The result is an adequate signal-to-noise ratio over the entire input range, without requiring large power dissipation and chip area. A number of other related ideas are being investigated as well. One is the use of dynamic biasing, in which the bias levels of dynamical analog circuits, such as filters, are dynamically varied depending on the signal level; the other is the use of multiple signal processors, each being placed dynamically in the path of the signal as required. Since output disturbances would normally occur when the internal parameters of a dynamical system are varied, a key consideration in this research is how to eliminate such disturbances or prevent them from occurring.

哥伦比亚大学的UYannis Tsividis这项研究探讨了使用内部非线性系统进行线性模拟信号处理的可能性。这种情况是完全集成的系统，在单个硅芯片上制造，包含一个数字信号处理器或一台计算机加上一个模拟信号处理器;后者通常是物理世界接口的必要部分。用于实现模拟处理器的传统线性技术通常导致非常大的能量消耗，这在许多实际情况下排除了它们。我们正在研究使用内部非线性处理器来绕过这些限制。这项工作的应用从无线通信和计算机硬件扩展到消费类产品，以生物医学instrumentation.The使用的输入输出线性信号处理器，允许内部非线性允许的内部信号，对于一个大的输入信号范围，一个幅度远高于噪声和干扰，而在同一时间保持安全低于过载水平。其结果是在整个输入范围内具有足够的信噪比，而不需要大的功耗和芯片面积。其他一些相关的想法也正在研究中。 一种是使用动态偏置，其中动态模拟电路（如滤波器）的偏置电平根据信号电平动态变化;另一种是使用多个信号处理器，每个处理器根据需要动态放置在信号路径中。由于输出扰动通常会发生时，动态系统的内部参数发生变化，在本研究中的一个关键考虑是如何消除这种干扰或防止它们的发生。