Reducing Electromagnetic Interference Using Globally Asynchronous Locally Synchronous Approach
In this paper, the possibilities of reducing EMI in GALS systems are investigated and presented. Based on the special software tool for EMI analysis, several different abstract models of GALS circuits have been designed in order to extract a realistic EMI properties of a GALS system. Based on the clock behavior, we have been able to analyze using our tool the current profile of each modeled system, both in frequency and in time domain. The results have been compared with the synchronous counterparts including low-EMI solutions. As a result, a reduction up to 25 dB can be achieved when applying a low-EMI GALS methodology in comparison to the synchronous designs. Finally, we have analyzed EMI reduction depending on the granularity of GALS approach. We have analyzed the limits of EMI reduction with high granularity GALS systems and extrapolated the results for asynchronous systems.
Keywords: ASYNCHRONOUS DESIGN; CURRENT PEAKS; EMI; GALS
Document Type: Research Article
Publication date: 01 April 2010
- The electronic systems that can operate with very low power are of great technological interest. The growing research activity in the field of low power electronics requires a forum for rapid dissemination of important results: Journal of Low Power Electronics (JOLPE) is that international forum which offers scientists and engineers timely, peer-reviewed research in this field.
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