A. Issaoun, P. Hammes, M. Fagerlind, F. Chai, T. Roedle
{"title":"On Stability Analysis and Loop Oscillation of Multi-Finger GaN FET Cells for High Power Amplifiers","authors":"A. Issaoun, P. Hammes, M. Fagerlind, F. Chai, T. Roedle","doi":"10.23919/EUMIC.2018.8539867","DOIUrl":null,"url":null,"abstract":"Highly optimized multi-finger GaN HEMT's are prone to internal oscillations or odd-modes. Developing tools to detect and suppress these oscillations is of great help for GaN device designers. This manuscript proposes an internal oscillations detection technique based on a FET small-signal equivalent circuit coupled to Electromagnetic (EM) simulations. Then, a stability analysis technique is applied on the developed transfer function. The approach is demonstrated on three 8-finger cells using three different stability analysis techniques. All outcomes of the used stability techniques align which proves the accuracy of the developed approach.","PeriodicalId":248339,"journal":{"name":"2018 13th European Microwave Integrated Circuits Conference (EuMIC)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 13th European Microwave Integrated Circuits Conference (EuMIC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.23919/EUMIC.2018.8539867","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Highly optimized multi-finger GaN HEMT's are prone to internal oscillations or odd-modes. Developing tools to detect and suppress these oscillations is of great help for GaN device designers. This manuscript proposes an internal oscillations detection technique based on a FET small-signal equivalent circuit coupled to Electromagnetic (EM) simulations. Then, a stability analysis technique is applied on the developed transfer function. The approach is demonstrated on three 8-finger cells using three different stability analysis techniques. All outcomes of the used stability techniques align which proves the accuracy of the developed approach.