What This Document Is
This document represents Lecture Nine from the Introduction to Microelectromechanical Systems (MEMS) course (ELENG 247A) at the University of California, Berkeley. It delves into the intricacies of switched-capacitor filters, building upon previous lectures in the series. The material focuses on the theoretical underpinnings and practical design considerations essential for understanding and implementing these filters in various applications. It explores the challenges associated with signal sampling and the crucial role of pre-filtering techniques.
Why This Document Matters
This lecture is vital for students and engineers working with analog and mixed-signal integrated circuit design, particularly those focused on data conversion and signal processing. It’s most beneficial when studying filter design, sampled-data systems, and the impact of non-ideal effects on circuit performance. Understanding these concepts is foundational for designing efficient and accurate MEMS-based systems. Access to the full lecture content will provide a comprehensive understanding needed to tackle advanced coursework and real-world engineering problems.
Topics Covered
* Continuation of switched-capacitor filter theory
* Anti-aliasing filter design for sampled-data systems
* Noise analysis in switched-capacitor networks
* Different switched-capacitor integrator topologies (DDI and LD)
* Impact of parasitic capacitances on filter performance
* Design considerations including termination and transmission zero implementation
* Effects of non-ideal circuit characteristics on filter behavior
* Trade-offs between oversampling ratio and anti-aliasing filter order
What This Document Provides
* Detailed exploration of the sampling theorem and its implications.
* Discussion of aliasing phenomena and mitigation strategies.
* Examination of the frequency response characteristics of switched-capacitor filters.
* Insights into the requirements for effective anti-aliasing filter design.
* Considerations for achieving desired filter performance under varying conditions.
* A foundation for understanding the limitations and practical challenges of implementing switched-capacitor filters.