Investigation of power generation microdevices that utilize micromachining or MEMS for use in portable and self-powered systems. Autonomous and portable devices demand the need for small, lightweight energy supplies that can replace the use of conven
By Kelvin Yuk and Chi Ho Yue EEC282 June 14, 2002 Introduction The purpose of this project is to explore details and benefits of co-design. We choose to implement the 1024-Point FFT for its applications in signal processing and communication. The
Review by Kelvin Yuk Presented: June 11, 2003 Like Dislike
A high-voltage (HV) integrated circuit has been demonstrated to transport droplets on programmable paths across its coated surface. This chip is the engine for a dielectrophoresis (DEP)-based micro-fluidic lab-on-a-chip system. This chip creates DEP
By Kelvin Yuk and Jorge Campos Written: June 7, 2002 Even though research on Silicon-on-Insulator (SOI) devices has proven it to be the next technology that will significantly improve the performance of digital integrated circuits, many skeptics have
By Kelvin Yuk and Jackie Xue Originally published Mar 12, 2003 Introduction In our project, we explore two different circuit design optimization techniques. We first implement the steepest descent algorithm to exemplify some of the basic concepts in
A new, simplified empirical large-signal model for high power microwave SiC MESFETs is presented. A generalized drain current source equation is developed, allowing close predictions of both pulsed and static IV characteristics, which vary significan
By Kelvin Yuk, G. R. Branner and David McQuate First appears: IEEE MTT-S Int. Microw. Symp., pp. 753-756, Jun. 2009. A new empirical large-signal model for high-power GaN HEMTs utilizing an improved drain current (Ids) model is presented. The new
By Kelvin Yuk, Claudia Wong, G. R. Branner Originally appears: European Microwave Integrated Circuits Conference., pp. 612-615, Sept 2010. Abstract An active microwave frequency tripler using an AlGaN/GaN HEMT device is developed. This is the first
As reduced order modeling of large scale systems by using Pade approximation has become an important part of improving the computation speed of circuit simulation, more methods are being explored. Pade approximation by moment matching (AWE)
A high-voltage (HV) integrated circuit has been demonstrated to transport fluidic droplet samples on programmable paths across the array of driving electrodes on its hydrophobically coated surface. This exciter chip is the engine for dielectrophoresi
Microwave frequency multipliers provide a high performance means of generating microwave and millimeter-wave signals in a wide variety of communications and radar systems. The advances in active microwave frequency multipliers due to improvements in
