Bernhard Boser (Advisor)

Parametric Oscillation with Wineglass Disk Resonators

Thanh-Phong Nguyen
Clark T.-C. Nguyen
Bernhard E. Boser
2018

Parametric oscillation provides another avenue to excite micro electro-mechanical resonators into oscillation. Rather than driving the resonator at its resonant frequency, modulating the stiffness of the resonator forces this motion. While this technique can lead to failures, it also can provide methods for frequency division, phase noise reduction, and sustaining oscillations of various frequency with a single amplifier. This work models the voltage conditions for parametric oscillation and compares them to measured results with an accuracy of 15%. Discrepancies caused by...

Design Issues For Differential Z-Axis Accelerometers

Monico Ortiz
Bernhard E. Boser
Roger T. Howe
1996

Accelerometers which are sensitive to inputs perpendicular to the substrate (2-Axis) are the key to monolithic three axis acceleration sensing. The inherent asymmetry of the capacitive interface of the Z-Axis sensing element fabricated in surface micromachining technology with a single...

Position Sensing for Electrostatic Micropositioners

Naiyavudhi Wongkomet
Bernhard E. Boser
Paul R. Gray
Albert A. Pisano
1998
This research investigates the design of capacitive position sensing circuits for electrostatic micropositioners. The goals of this investigation are to understand the interaction among the micropositioners, the driving circuits, and the position sensing ...

Micro Accelerometer Design with Digital Feedback Control

Mark Lemkin
David M. Auslander
Bernhard E. Boser
Albert P. Pisano
1997
In this work, design of capacitive accelerometers with CMOS electronics is investigated. The goal of this investigation is to form accurate behavioral models at three different levels of abstraction: system, electrical, and mechanical. Analysis of these models permits a deeper understanding of both accelerometer design and design trade-offs. The results of this work are used to obtain an accurate prediction of accelerometer performance. At the system level, simultaneous force-balancing and analog-to-digital...

Capacitive Power Transfer

Mitchell Kline
Bernhard E. Boser
Seth R. Sanders
2011

The simplicity and low cost of capacitive interfaces makes them very attractivefor wireless charging stations and galvanically isolated power supplies. Major benefits include low electromagnetic radiation and the amenability of combined power and data transfer over the same interface.

We present a capacitive power transfer circuit using series resonance that enables efficient high frequency, moderate voltage operation through soft-switching. An included analysis predicts fundamental limitations on...

Yu-Ching Yeh

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
M.S. 2016

Naiyavudhi Wongkomet

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 1998

Amy Wu

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
M.S. 2008

Joseph Seeger

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
M.S. 2004

Manu Seth

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
M.S. 2004