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In this paper, a direct ac-dc power electronic converter topology is proposed for efficient and optimum energy harvesting from low-voltage microgenerators. The converter utilizes the bidirectional current-conduction capability of MOSFETs to avoid the use of a front-end bridge rectifier. It is operated in discontinuous conduction mode and offers a resistive load to the microgenerator. Detailed analysis...
The power supply designers recognize more and more the importance of fast and accurate simulations. Converter designs based on erroneous loss calculation can overload components or even destroy them. Boundary conduction mode (BCM/CrCM) with valley skipping is an often used control method for PWM converters in order to increase efficiency by limiting the switching frequency of the converter. However,...
A new modeling method of Buck-Boost converter operating in discontinuous conduction mode (DCM) is presented. The method is based on the principle of energy conservation and equivalent circuit modeling method. In the modeling, the parasitic components of the Buck-Boost converter and the MOSFET delay are considered. Large signal averaged, dc and small signal circuit models of the Buck-Boost converter...
Two kinds of novel converter circuits containing single-electron transistors and MOS transistors are proposed. The proposed Digital to Analog Converter (DAC) circuit and Analog to Digital Converter (ADC) circuit are both improved in the base of the pure SET and SET/MOS hybrid circuits that were designed by other research groups, so they possess the merits of both SET and MOS circuits. Through the...
High bandwidth junction temperature measurement provides a key signal for active thermal control to improve reliability of power electronics. Recently developed isolated techniques to estimate junction temperature from the decay of turn-on ringing depending on circuit properties are not well documented in existing circuit models. This paper focuses on how to develop circuit models that are suitable...
In this paper, a step-up micro power converter for solar energy harvesting applications is presented. The circuit is based on a switched-capacitor voltage doubler architecture with MOSFET capacitors, which results in an area approximately eight times smaller than using MiM capacitors for the 0.13μm CMOS technology. In order to compensate for the loss of efficiency, due to the larger parasitic capacitances,...
In this paper a new synthesis for circuit design of Euclidean distance calculation based on a two-quadrant squarer/divider is presented. The circuit employs MOSFETs that operate in strong inverted saturation region performing electronically simulated translinear loop. The converter features very low supply voltage (0.9 V), immune from body effect, two-quadrant input current, large dynamic range, and...
This paper present an evaluation of the reliability of LDMOS transistors in synchronous DC-DC buck converter using physical-based mixed device and circuit simulation. It is observed that impact ionization, lower temperature, and radiation degrade power MOSFET performances and could lead to potential failure if heavy ions strike the converter at critical time during switching.
Minimum stray inductances are of high importance for power modules and stacks of converters. This paper describes the optimization of the stray inductance for a compact DBC based three-phase power module for use in 5 to 20 kW converters for automotive application. The inductances of different DBC layouts and mounting technologies are compared and optimized, including chip connection with soldered...
In this paper a new current-mode true RMS-DC converter based on a two-quadrant squarer/divider is presented. The circuit employs MOSFETs that operate in strong inverted saturation region performing electronically simulated translinear loop. The converter features very low supply voltage (1.2 V), immune from body effect, two-quadrant input current, large dynamic range, and low circuit complexity. Simulation...
The present work presented the design of neuronal circuit and programmable inverter circuit used for design of soft-hardware-logic circuit that represents Boolean functions just configuring external signals fabrication in silicon CMOS technology based in floating gate transistor, also present the simulation of SHL and characteristic the programmable inverter. The simulations were done using PSpice,...
A novel inductive contactless energy transmission (CET) system is presented in this work. The energy is transmitted using rotatable transformer with adjustable air gap and power converter. To minimize total losses of the system a series resonant circuit is applied. This ensures zero switching condition for MOSFET power transistors. The expression and analytical results of the transfer DC voltage gain...
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