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Extending test signal generation using sigma-delta encoding beyond the voltage/amplitude domain.

机译：使用sigma-delta编码将测试信号生成扩展到电压/幅度域之外。

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摘要

This thesis extends signal generation techniques using sigma-delta encoding principles for synthesizing test signals of all types. In fact, sigma-delta encoding is used to generate repeatable and programmable noise-like signals; phase domain signals such as accurate phase offsets, sinusoidal and Gaussian jitter; and frequency domain signals used for accurate frequency synthesis.;Moreover, a novel bit-to-bit mapping algorithm that converts digital signals to either phase or frequency, is proposed. A digital-to-time conversion (DTC) algorithm is used to convert a digital signal to the phase domain; likewise, a digital-to-frequency conversion (DFC) algorithm is used to convert a digital signal to the frequency domain. The DTC or DFC conversion algorithm is implemented in software together with the sigma-delta encoding process in order to digitally encode a phase or frequency domain signal. The resulting bit sequence with the desired phase or frequency signal is then captured and applied cyclically to an analog time/frequency-mode reconstruction filter. The time/frequency-mode filtering is realized by a PLL structure with the desired phase/frequency domain transfer function.;All signal generation schemes (amplitude, noise, phase and frequency) consist of a digital bit-stream with the desired signal encoded and a reconstruction filtering device in the appropriate domain. Using the proposed techniques and circuits, robust, programmable, repeatable, and portable test signals in the amplitude, phase, and frequency domains can be synthesized at low-cost. Although the techniques are demonstrated in a production test environment using a commercial mixed-signal tester, the methodology can be implemented in any testing environment: production test, characterization test, design-for-test (DFT), or built-in self-test (BIST).;For the synthesis of noise-like signals, a Gaussian noise with the desired frequency characteristic is encoded in the voltage/amplitude domain in software using sigma-delta modulation. The resulting sequence of bits is then captured and applied cyclically to an analog filter to reconstruct the noise-like signal with the desired frequency spectrum (e.g. spectrum with a notch for noise-power ratio test).
机译：本文扩展了使用sigma-delta编码原理的信号生成技术，用于合成所有类型的测试信号。实际上，sigma-delta编码用于生成可重复和可编程的类似噪声的信号。相位域信号，例如精确的相位偏移，正弦和高斯抖动；此外，提出了一种将数字信号转换为相位或频率的新型位到位映射算法。数时转换（DTC）算法用于将数字信号转换到相位域。同样地，使用数频转换（DFC）算法将数字信号转换到频域。 DTC或DFC转换算法与sigma-delta编码过程一起在软件中实现，以便对相位或频域信号进行数字编码。然后捕获具有所需相位或频率信号的结果位序列，并将其循环应用于模拟时间/频率模式重构滤波器。时间/频率模式滤波是通过具有所需相位/频域传递函数的PLL结构来实现的;所有信号生成方案（幅度，噪声，相位和频率）都由数字比特流组成，所需的信号经过编码和适当域中的重建过滤设备。使用提出的技术和电路，可以低成本合成幅度，相位和频域中的鲁棒，可编程，可重复和便携式测试信号。尽管已使用商用混合信号测试仪在生产测试环境中演示了这些技术，但该方法可以在任何测试环境中实施：生产测试，特性测试，测试设计（DFT）或内置自测（BIST）;;为了合成类噪声信号，使用sigma-delta调制在软件的电压/幅度域中对具有所需频率特性的高斯噪声进行编码。然后捕获所得到的比特序列并将其循环施加到模拟滤波器，以重建具有所需频谱（例如具有用于噪声-功率比测试的陷波的频谱）的类噪声信号。

著录项

  • 作者

    Aouini, Sadok.;

  • 作者单位

    McGill University (Canada).;

  • 授予单位 McGill University (Canada).;
  • 学科 Electrical engineering.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 205 p.
  • 总页数 205
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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