RIA: Fundamentals of Delta-Sigma Modulation

RIA：Delta-Sigma 调制的基础知识

• 批准号: 9210935
• 负责人: Richard Schreier
• 金额: $ 6.97万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9210935&HistoricalAwards=false
• 关键词: RIA; Fundamentals; Delta; Sigma; Modulation

Schreier Delta-sigma modulation forms the foundation for the highly linear and manufacturable analog-to-digital and digital-to-analog converters known as "oversampled noise-shaping" converters. These circuits find application in narrow band systems such as digital audio equipment and medical and geophysical instrumentation. At present, there are no adequate tests for stability of these nonlinear systems - designers can only use extensive computer simulations and hope that the simulations exercise the circuit adequately. This research is developing a quick and completely rigorous method which combines analytical techniques with numerical algorithms to prove the robust stability of a delta-sigma modulator. The idle-channel noise of delta-sigma modulators is a second research topic. How to guarantee aperiodic behavior in delta-sigma modulators is being shown, but this alone is not sufficient to guarantee an absence of tones. Listening experiments using data derived from simulations need to be performed in order to judge the effectiveness of the technique. The results of these investigations are being incorporated into a computer program for the automated design of delta-sigma modulators.

Schreier Δ-Σ调制构成了高度线性和可制造的模数和数模转换器（称为“过采样噪声整形”转换器）的基础。这些电路可应用于窄带系统，如数字音频设备和医疗和地球物理仪器。目前，还没有足够的测试这些非线性系统的稳定性-设计人员只能使用广泛的计算机模拟，并希望模拟充分行使电路。本研究发展一种快速且完全严谨的方法，将解析技术与数值演算法结合，以证明delta-sigma调变器的强健稳定性。 delta-sigma调制器的空闲信道噪声是第二个研究主题。如何保证delta-sigma调制器中的非周期性行为正在被示出，但是仅这一点不足以保证音调的缺失。为了判断该技术的有效性，需要使用来自模拟的数据进行听力实验。 这些调查的结果被纳入一个计算机程序的自动设计的delta-sigma调制器。