What This Document Is
These are classroom notes from an Introduction to Microelectromechanical Systems (MEMS) course (ELENG 247A) at the University of California, Berkeley. Specifically, this installment focuses on the design and implementation of filters within MEMS – a crucial component in many sensor and actuator systems. The notes represent a lecture’s worth of material, detailing various approaches to filter creation and optimization for micro-scale devices. It builds upon previous lectures concerning continuous-time filters and introduces advanced tuning techniques.
Why This Document Matters
This resource is ideal for students enrolled in an introductory MEMS course, or those with a foundational understanding of circuit design looking to specialize in micro-systems. It’s particularly valuable when studying analog circuit design, signal processing, and the challenges of miniaturization. These notes can be used to supplement textbook readings, clarify complex concepts presented in lectures, and provide a focused review of filter design principles as applied to MEMS. Understanding these concepts is essential for anyone aiming to design, analyze, or build functional MEMS devices.
Topics Covered
* Automatic on-chip filter tuning methodologies
* DC tuning of resistive timing elements within filters
* Continuous-time filter design considerations, including highpass and bandpass filters
* Lowpass to bandpass filter transformations
* Gm-C filter implementations and variations
* Digitally assisted filter tuning techniques for systems with ADCs and DSPs
* Practical implementation details for frequency tuning
What This Document Provides
* A detailed exploration of methods for dynamically adjusting filter characteristics.
* Discussion of utilizing existing hardware (like DSPs) to enhance filter performance.
* Conceptual frameworks for implementing filter tuning during periods of inactivity or offline processing.
* Insights into the trade-offs and challenges associated with different filter designs and tuning approaches.
* References to relevant research papers for further investigation into specific techniques.
