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A modular-multilevel (MMC) DC/DC converter is proposed in this paper, which can be deployed to inter-connect DC grid of different voltage levels, especially in the new energy sources such as wind power and solar power grid connection. Its key features include: 1) step-up and step-down operation. 2) bidirectional power flowing. 3) bi-directional fault blocking similar to a DC breaker. The operation...
The output voltage of SEPIC can be greater, less or equal to its input voltage, and respond more gracefully to short- circuit output. Working process of SEPIC working in discontinuous conduction mode (DCM) was analyzed in detail. The parameter calculation method of SEPIC is also given. The relationship between duty ratio and output voltage of SEPIC working in continuous conduction mode (CCM) and DCM...
An improved current bleeding CMOS mixer is designed in this paper. The conversion gain of the mixer is increased and the flicker noise of the mixer is reduced by inserting the inductor to form resonant circuit with parasitic capacitors of the source ports of the switch transistors in Gilbert mixer. The mixer is designed by using SMIC 0.18 um CMOS process. The simulated results show that the mixer...
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