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Design of Controller for New EAST Fast Control Power Supply

Plasma Science and Technology 2014年第11期16卷 1068-1073页

作者：黄海宏殷明王海欣 School of Electrical Engineering and Automation Hefei University of Technology

The effectiveness of the magnetic confinement of plasma can be improved by elongat- ing the plasma cross-section in tokamak devices. But elongated plasma has vertical displacement instability, so a feedback control system is needed to restrain the plasma＇s vertical displacement. A fast control power supply is needed to excite the active feedback coils, which produces a magnetic field to control the plasma＇s displacement. With the development of EAST, the fast control power supply needs to keep on enhancing the fast response and output current. The structure of a new power supply is introduced in this paper. The method of multiple inverters paralleled with the current sharing reactor is presented to meet the need for large current and fast control. According to the design demands of the EAST fast control power supply, the adjuster of the current close loop is applied to the inverter, which can advance its ability to restrain the loop current in low frequency and DC output. The result of the experiment confirms the validity of the proposed scheme and control strategy.

关键词： EAST plasma vertical stability active feedback fast control power supply current close loop

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维普期刊数据库

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Low power 13 Gbit/s VCSEL current driver in 0.18 μm CMOS for optical interconnection

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The Journal of China Universities of Posts and Telecommunications 2013年第2期20卷 125-128页

作者： CHEN Ying-mei WANG Jin-fei ZHANG Li LI Wei Institute of Radio Frequency & Optical Electronic Integrated Circuits Southeast University

A design of 13 Gbit/s vertical cavity surface emitting laser （VCSEL） driver using 0.18 μm complementary metal oxide semiconductor （CMOS） technology is presented in this paper. The core unit of the driver consists of pre-amplify stage and output stage circuit. Techniques of three stages differential amplifier with low impedance load and active feedback are employed in pre-amplify stage, and technique of C3A is adopted in output stage to acquire low power consumption and high speed. The experimental results show that the circuit can work at the data rate of 10 Gbit/s and maximum of 13.2 Gbit/s. The output modulation current is up to 12.5 mA and the power dissipation is only 68 mW with a 1.8 V power supply.

关键词： VCSEL CMOS laser current driver active feedback

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维普期刊数据库

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A 40 Gbit/s fully integrated optical receiver analog front-end in 90 nm CMOS

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The Journal of China Universities of Posts and Telecommunications 2012年第1期19卷 124-128页

作者： XU Zhi-gang CHEN Ying-mei WANG Tao CHEN Xue-hui ZHANG Li Institute of RF-&OE-ICs Southeast UniversityNanjing 210096China

A fully integrated 40 Gbit/s optical receiver analog front-end （AFE） including a transimpedance amplifier （TIA） and a limiting amplifier （LA） for short distance communication is described in this paper. The proposed TIA employs a modified regulated cascode （RGC） configuration as input stage, and adopts a third order interleaving active feedback gain stage. The LA utilizes nested active feedback, negative capacitance, and inductor peaking technology to achieve high voltage gain and wide bandwidth. The tiny photo current received by the receiver AFE is amplified to a single-ended voltage swing of 200 mV（p-p）. Simulation results show that the receiver AFE provides conversion gain of up to 83 dBΩ and bandwidth of 34.7 GHz, and the equivalent input noise current integrated from 1 MHz to 30 GHz is about 6.6 μA（rms）.

关键词： optical receiver transimpedance amplifier limiting amplifier active feedback negative capacitance inductor peaking

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