Decoupling (electronics)

About: Decoupling (electronics) is a research topic. Over the lifetime, 10395 publications have been published within this topic receiving 100706 citations. The topic is also known as: decoupling (electronics).

Active Power Decoupling for High-Power Single-Phase PWM Rectifiers

Abstract: Single-phase pulsewidth modulation rectifiers suffer from ripple power pulsating at twice the line frequency. The ripple power is usually filtered by a bulky capacitor bank or an LC branch, resulting in lower power density. The alternative way is active power decoupling, which uses an active circuit to direct the pulsating power into another energy-storage component. The main dc-link filter capacitor can, therefore, be reduced substantially. This paper proposed a new scheme of active power decoupling. The circuit consists of a third leg, an energy-storage capacitor and a smoothing inductor. The topology combined the advantages of high energy-storage efficiency and low requirement on control bandwidth. Both the pulsating power from the ac source and the reactive power of the smoothing inductors are taken into consideration when deriving the power decoupling scheme. The active power filter's (APF) capacitor voltage control system consists of inner loop pole-placement control and outer loop proportional-resonant control. To enhance the steady-state performance, the capacitor voltage reference is modified in a closed-loop manner. Simulation and experimental results show that the proposed APF scheme has good power decoupling performance and is more suited for high-power applications where switching frequency is limited.

From Ritual to Reality: Demography, Ideology, and Decoupling in a Post-Communist Government Agency

Abstract: Decoupling—the creation of gaps between formal policies and actual practices—is ubiquitous in organizations. Yet little research has examined how decoupling unfolds over time. This qualitative case study of a post-Communist government agency develops process models of what precedes and what follows the decision to decouple. I show that the demography and ideology of powerful organization members influence whether decoupling occurs, how it unfolds, and whether it is sustainable. Further, I suggest decoupling may carry seeds of its own decay: under certain conditions, the decision to decouple can trigger demographic changes that eventually erode decoupling.

A Review of Mutual Coupling in MIMO Systems

Abstract: This paper provides a systematic review of the mutual coupling in multiple-input multiple-output (MIMO) systems, including the effects on performances of MIMO systems and various decoupling techniques. The mutual coupling changes the antenna characteristics in an array, and therefore, degrades the system performance of the MIMO system and causes the spectral regrowth. Although the system performance can be partially improved by calibrating out the mutual coupling in the digital domain, it is more effective to use decoupling techniques (from the antenna point) to overcome the mutual coupling effects. Some popular decoupling techniques for MIMO systems (especially for massive MIMO base station antennas) are also presented.

High density chip carrier with integrated passive devices

Abstract: A carrier for a semiconductor component is provided having passive components integrated in its substrate. The passive components include decoupling components, such as capacitors and resistors. A set of connections is integrated to provide a close electrical proximity to the supported components.