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Fremont, CA, United States

General instability (critical) conditions for a class of switched linear systems (such as DC-DC converters) with switching delays are derived. Many instability conditions for the systems with fixed/variable-switching frequency under various control schemes are also derived. The conditions also show the required ramp slopes to stabilize the converters. Some previously known instability conditions become special cases in this generalized framework. Given an arbitrary control scheme, a systematic procedure is proposed to derive the instability condition for that control scheme. Different control schemes (such as V2 control and voltage/current mode control, for example) are shown to have similar forms of instability conditions. © 2014 Springer Science+Business Media Dordrecht.

Fang C.-C.,Inno Inc
International Journal of Electronics | Year: 2013

Although existence of multiple periodic orbits in some DC-DC converters have been known for decades, linking the multiple periodic orbits with the saddle-node bifurcation (SNB) is rarely reported. The SNB occurs in popular DC-DC converters, but it is generally reported as a strange instability. Recently, design-oriented instability critical conditions are of great interest. In this article, average, sampled-data and harmonic balance analyses are applied and they lead to equivalent results. Many new critical conditions are derived. They facilitate future research on the instability associated with multiple periodic orbits, sudden voltage jumps or disappearances of periodic orbits observed in DC-DC converters. The effects of various converter parameters on the instability can be readily seen from the derived critical conditions. New Nyquist-like plots are also proposed to predict or prevent the occurrence of the instability. © 2013 Copyright Taylor and Francis Group, LLC.

Inno Inc | Date: 2016-06-13

Portable speakers; wireless speakers; loud speakers.

Inno Inc | Date: 2016-06-13

Portable speakers; wireless speakers; loud speakers; headphones; home audio devices.

Inno Inc and Dh Infotech Weihai Inc. | Date: 2012-04-06

The present invention relates to the technical field of fiber splicing devices, particularly to a multifunctional splicing clamp for fixing an optical fiber during the fiber splicing process. A new multi-functional splicing clamp of the present invention, for use in a fiber splicing device, comprises a clamp body and a clamp cover body. One side of said clamp body is pivotally connected to the clamp cover body. Said clamp body is provided with a fiber-carrying pad, and said clamp cover body is provided with an abutment structure which can abut said fiber-carrying pad. Compared to the prior art, a new multifunctional splicing clamp of the present invention can simultaneously match wire cables with big differences in diameters, such as rubber-insulated cables, jumper wires, 2.5 mm optical cables, 900 um optical fibers, 250 um optical fibers, and 80 um optical fibers. When different types of optical fibers are spliced, it is unnecessary to replace the clamp, resulting in convenient operations and greatly improved efficiencies.

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