What This Document Is
These are detailed class notes from an Introduction to Microelectromechanical Systems (MEMS) course (ELENG 247A) at the University of California, Berkeley. The notes specifically focus on the principles and techniques behind oversampled Analog-to-Digital Converters (ADCs). This material represents a deep dive into a crucial component within the broader field of MEMS design and signal processing. The notes are approximately 31 pages in length and provide a comprehensive overview of the subject.
Why This Document Matters
This resource is ideal for students currently enrolled in an introductory MEMS course, particularly those focusing on data conversion and signal conditioning. It’s also valuable for electrical engineering students needing a focused understanding of advanced ADC architectures. These notes can be used as a study aid to reinforce lecture material, prepare for assignments, or build a stronger foundation for more advanced coursework. Understanding oversampling techniques is essential for anyone designing or working with precision measurement systems and low-power electronic devices.
Topics Covered
* The rationale and benefits of employing oversampling in ADC design.
* Pulse-Count Modulation techniques and their spectral characteristics.
* Sigma-Delta Modulation, including 1-bit quantization and noise shaping.
* Analysis of Signal-to-Quantization Noise Ratio (SQNR) in oversampled converters.
* Practical considerations for implementing high-order sigma-delta modulators.
* The impact of non-ideal circuit characteristics on modulator performance.
* Decimation filtering and its role in oversampled ADC systems.
* Dynamic range considerations in ADC design.
What This Document Provides
* A detailed exploration of the theoretical underpinnings of oversampling.
* Insights into the trade-offs between speed and resolution in ADC design.
* An examination of the frequency domain behavior of quantized signals.
* A framework for understanding the advantages of predictive coding techniques.
* A discussion of the key components within a sigma-delta modulator architecture.
* Visual representations and diagrams to aid in comprehension of complex concepts.
* A focused resource for mastering a core topic within the field of MEMS.
