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Synchronous buck converters with normally off MOSFETs are widely used for point of load converters. Recently introduced, normally on, high electron mobility, power devices shown to have excellent switching characteristics with very low on state voltage drop. To drive a normally on MOSFET, a gate drive with bipolar voltage capability is required. Generation of a bipolar voltage from a positive voltage...
This paper presents an innovative resonant multilevel modular bidirectional dc-dc switched-capacitor converter based on GaN switching devices. Proposed converter achieves the following advantages; soft switching, low voltage device rating, boost or buck mode, common ground, high conversion ratio, variety of environment temperature operation, simple control algorithm and modular structure. The proposed...
The use of high voltage allows a power processing system to operate with low currents, improving efficiency. Nevertheless, final applications usually require low voltage inlet, which can be provided using modular multilevel converters submodules, for instance. However, every submodule's gate-unit requires energy from an isolated low power auxiliary supply. Generally, this is done by using an external...
This papers presents a complete study of the boundary conduction mode (BCM) for a dual input hybrid buck DC-DC converter (HBLC). It includes the operating principles and the analytic expressions for the key currents and voltages. A numerical method is used for solving the BCM equations in order to find the proper values of the converter inductances, as a function of the working conditions. Digital...
The unipolar gate driving method provides a low cost and simple solution for inverter system design. However, the unipolar gate driving can cause issues like ‘parasitic oscillation’ during turn-on of power switches and ‘unintended parasitic turn-on’ caused by the Miller-effect of power semiconductors. Hence the maximum value of gate resistance has to be limited. To overcome the above mentioned issues,...
In this paper, switch-induced error voltage of a MOS switch in a deep submicron technology, is modeled and analyzed using a continuous and physical formulation based on the EKV model. In order to show the effectiveness of this error estimation model, it has been applied to correct the DAC switch-induced error voltages in a 12-bit 1Ms/s charge-redistribution Successive Approximation (SAR) ADC. SPICE...
With technology scaling, vulnerability to soft errors in random logic is increasing. There is a need for on-line error detection and protection for logic gates even at sea level. The error checker is the key element for an on-line detection mechanism. We compare three different checkers for error detection from the point of view of area, power and false error detection rates. We find that the double...
Emission spectroscopy of plasma-excited chemical species is widely used for generalized chemical analyses in bench-top systems. This paper explores the use of pulsed microdischarges between two and three electrode microstructures, which operate in air at atmospheric pressure, for use in handheld chemical analyzers. Pulsed microdischarges are fired between two-electrodes spaced apart by 0.2-2 mm. Synchronized...
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