A low voltage and low power switch mode power amplifier is proposed. It is designed using TSMC 0.35£gm 2p4m CMOS process technology. It can be applied to hearing aids, and the supply voltage is 1.5V. Experimental results show that the proposed amplifier has the total harmonic distortion (THD) of 0.094% and power efficiency around 79.6%. The proposed power amplifier has superior performance in THD and power efficiency, and it is suitable for low-power low-voltage applications.

Two novel ultra-low-voltage (ULV) low-power (LP) variable gain amplifiers (VGA) are presented in this paper. These amplifiers based on complementary MOS transistors operating in weak inversion region are composed of pseudo-exponential current-to-current converters and analog multipliers. The gain of the amplifiers can be controlled by an exponential function circuit. The proposed circuits have been verified with the 0.25£gm CMOS technology by HSPICE simulations. The simulation results confirm the feasibility of the proposed VGAs.

Thesis (Ph. D.)--University of Washington, 1997. / Vita. Includes bibliographical references (p. [81]-83).

Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 51-53). Also available on the World Wide Web.

This paper investigates the voltage and phase dynamics of a low inertia inverter based Microgrid in islanded operation. In such case, the network is less robust to disturbances due to the lack of associated inertia within an inverter. In islanded operation, the assumption of a stiff grid is no longer valid due to the voltage and phase adjustment based on conventional droop control have a resulting effect on the power flows throughout the network where voltage and frequency stability of the network may be compromised. Other approaches neglect the network dynamics when there are power imbalances in the system and how each node is affected and if the resulting increase in demand can be met with the available power generation. This paper uses the fact that the phase dynamics of coupled inverters that employ droop control closely resemble the phase dynamics proposed by the Kuramoto model. Using this model allows the network stability to be analyzed under the true nonlinear operation. It Is observed through the strong coupling impedance of the secondary distribution transmission lines and the implementation of proportional droop control will provide an appropriate means for rural and suburban neighborhoods to operate independently, given the proportional droop gain is tuned appropriately.

Thesis (doctoral)--Technische Universiteit Delft, 1997. / Includes bibliographical references.

Thesis (doctoral)--Technische Universiteit Delft, 1997. / Includes bibliographical references.

Yuen Chi Lap. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 88-94). / Abstracts in English and Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Motivation --- p.1 / Chapter 1.2 --- Aims --- p.2 / Chapter 1.3 --- Contributions --- p.3 / Chapter 1.4 --- Thesis Organization --- p.4 / Chapter 2 --- Background and Literature Review --- p.5 / Chapter 2.1 --- Introduction --- p.5 / Chapter 2.2 --- Vibration-to-Electrical Transducer --- p.6 / Chapter 2.2.1 --- Electromagnetic (Inductive) Power Conversion --- p.6 / Chapter 2.2.2 --- Electrostatic(Capacitive) Power Conversion --- p.8 / Chapter 2.2.3 --- Piezoelectric Power Conversion --- p.9 / Chapter 2.3 --- Wireless Sensor Platform Examples --- p.11 / Chapter 2.3.1 --- MICA[13] from UC Berkeley[49] --- p.11 / Chapter 2.3.2 --- WINS[48] from UCLA[51] --- p.13 / Chapter 2.3.3 --- Wong's Infrared System[5] --- p.13 / Chapter 2.4 --- Summary --- p.14 / Chapter 3 --- Micro Power Generator --- p.16 / Chapter 3.1 --- Introduction --- p.16 / Chapter 3.2 --- MEMS Resonator --- p.18 / Chapter 3.2.1 --- Laser-machinery --- p.18 / Chapter 3.2.2 --- Electroplating Fabrication --- p.18 / Chapter 3.3 --- Voltage Multiplier --- p.19 / Chapter 3.4 --- "Modeling, Simulations and Measurements" --- p.21 / Chapter 3.5 --- Summary --- p.30 / Chapter 4 --- Low Power Wireless Sensor Platform --- p.37 / Chapter 4.1 --- Introduction --- p.37 / Chapter 4.2 --- Generic Platform --- p.37 / Chapter 4.2.1 --- Startup Module and Power Management --- p.38 / Chapter 4.2.2 --- Control Unit --- p.43 / Chapter 4.2.3 --- Input Units (Sensor Peripherals) --- p.46 / Chapter 4.2.4 --- Output Units (Wireless Transmitters) --- p.48 / Chapter 4.3 --- Summary --- p.57 / Chapter 5 --- Application I - Wireless RF Thermometer --- p.59 / Chapter 5.1 --- Overview --- p.59 / Chapter 5.2 --- Implementation --- p.60 / Chapter 5.2.1 --- Prototype 1 --- p.60 / Chapter 5.2.2 --- Prototype 2 --- p.60 / Chapter 5.2.3 --- Prototype 3 --- p.62 / Chapter 5.2.4 --- Prototype 4 --- p.63 / Chapter 5.3 --- Results --- p.65 / Chapter 5.4 --- Summary --- p.67 / Chapter 6 --- Application II - 2D Input Ring --- p.70 / Chapter 6.1 --- Overview --- p.70 / Chapter 6.2 --- Architecture --- p.70 / Chapter 6.3 --- Software Implementation --- p.72 / Chapter 6.3.1 --- Methodology --- p.72 / Chapter 6.3.2 --- Error Control Code --- p.73 / Chapter 6.3.3 --- Peripheral Control Protocol --- p.75 / Chapter 6.4 --- Results --- p.77 / Chapter 6.5 --- Summary --- p.83 / Chapter 7 --- Conclusion --- p.84 / Chapter 7.1 --- Micro power generator --- p.84 / Chapter 7.2 --- Low power wireless sensor applications --- p.85 / Chapter 7.2.1 --- Wireless thermometer --- p.85 / Chapter 7.2.2 --- 2D input ring --- p.86 / Chapter 7.3 --- Further development --- p.86 / Bibliography --- p.88 / Chapter A --- Schematics --- p.97

We developed low voltage wide swing second generation current conveyors(CCII) with the application to a insensitive Butterworth second-order low-pass filter. All circuits are designed using the parameters of TSMC 1P4M 0.35um process. The minimum supply voltage of CCII(1) circuit is |Vtp|+3Vod. The supply voltage of CCII(2) circuit is |Vtp|+2Vod. The voltage swing of the CCIIs are almost rail to rail.

Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.