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Step-up dc-dc converters are being extensively studied due to the diffusion of battery powered, renewable energy, traction systems and electrical power systems applications. Coupled-inductor step-up topology can be efficient when high step-up gains are required. The paper investigates the dependence of the efficiency on design parameters for a bidirectional dc-dc converter. The sliding mode control...
Boost converters are widely used in the low-to-high DC/DC application and power-factor-corrected circuits. Based on the interleaved boost converter with coupled inductors, a converter consisting of four interleaved boost converter cells is proposed in this paper. The boost converter cells can share the input current, so this prototype circuit can be designed to have small input current ripple. And...
This paper describes theoretical as well as practical aspects in designing low phase noise LC CMOS oscillators. It starts with an overview of the different oscillator performance parameters found in a typical oscillator specification sheet. It also describes the LC-tank oscillation phenomena by analyzing a simplified LC oscillator circuit. Oscillator phase noise analysis is then introduced as a logical...
A low-power ultra-compact CMOS low-noise amplifier (LNA) in a shunt-resonating current-reused topology is presented. The common-source transistors are connected with a shunt-resonating inter-stage match network such that the bias current is shared to have low power consumption and RF signal is doubly amplified to have high gain and low noise figure. The implemented 0.18 mum CMOS LNA achieves 15.2...
This paper proposes a novel bidirectional AC-AC converter based on the Z-source concept. This converter can provide bidirectional power flow. It has symmetrical circuit structure, and can reduce in-rush and harmonic current, provide larger range of output AC voltage and improve reliability. Simulation results verify the validity of the proposed converter.
This paper proposes an input-paralleled output-paralleled half-bridge converter based on single half-bridge converter, which is very suitable for the low output voltage and large output current application. All modules share a common capacitor-leg, that can reduce the number of main circuitpsilas capacitors and make topology simple. The traits and rules of combination converter are introduced and...
In order to solve the problem that the existing rubber-tyred gantry (RTG) crane consumes massive generating/braking energy through resistance, produces plenty of heat, causes excessive fuel consumption and exhaust emission during working, the relation of energy flows of the existing system is analyzed and the value of the improvement of energy-saving is confirmed in the paper. The constitution and...
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