Michail E. Kiziroglou

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—The difficulty of maximizing the proof mass, and lack of broadband operation, are key issues for miniaturized energy-harvesting devices. Here, a novel electrostatic energy harvester is presented, employing an external free-rolling proof mass to address these issues. A description of the operating principle is given, and the kinetic dynamics of the cylinder(More)
One of the main challenges in developing wireless biometric sensors is the requirement for integration of various systems into a very compact device. Such systems include sensing units, conditioning electronics, transmitters and power supplies. In this work, a novel system integration architecture is presented. A unique feature of this new architecture is(More)
A motion-powered pulse generator using piezoelectric transduction is reported in this paper for wireless sensing devices. A metallic rolling ball is implemented in the prototype as an inertial proof mass excited by external motions at random low frequency. Taking advantage of the metallic proof mass, magnetic coupling can be achieved to actuate the(More)
The ever growing demand for electricity needs to be fulfilled with due cognizance of the environment factor and recycling energy as effectively as possible. This paper proposes the harnessing of the heat energy wasted in household appliances all of which can generate power in milli watt range. The most promising equipment for the supply of waste heat which(More)
Soon, pervasive computers will enormously outnumber humans. Devices requiring sufficient energy to operate maintenance-free for periods of years and beyond render today's technologies insufficient. With the gap between energy requirements of embedded systems and achievable levels of harvested power reducing, viable hybrid energy and power management(More)
There are two simple methods of supplying power to a wireless, low-power sensor in an aircraft: a battery, or direct access to the aircraft power line. In the former, the battery will eventually need to be replaced whilst the latter option, which is highly intrusive and difficult to retrofit into existing aircraft, increases the weight and presents(More)
This paper presents a piezoelectric pulse generator for body sensing and wireless transmission. A steel rolling ball is used as a proof mass to provide a smooth motion excited by non-harmonic external vibrations. In addition, the proof mass in this prototype is implemented to achieve both impulse excitation of the piezoelectric cantilever by magnetic(More)
The quality factor (Q) of integrated inductors is of great importance to radio frequency applications. Monolithic integration of out-of-plane Au inductors with Complementary Metal-Oxide-Semiconductor (CMOS) LC oscillators is reported in this paper. The recently developed self-assembly process involves in-plane fabrication of Au inductors and subsequent(More)