GaN HEMT modeling for power and RF applications using ASM-HEMT

Sudip Ghosh, Sheikh Aamir Ahsan, Avirup Dasgupta, Sourabh Khandelwal, Yogesh Singh Chauhan

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

12 Citations (Scopus)


In this paper, we aim to present an overview of a surface-potential (SP) based model named "Advanced Spice Model for High Electron Mobility Transistor" (ASM-HEMT) for AlGaN/GaN HEMTs. This model is presently under consideration in the phase-III of industry standardization by the Compact Model Coalition (CMC). SP of GaN HEMT is obtained by solving Schrodinger and Poisson equations in the triangular potential well considering the first two energy subbands. The core drain current model and a intrinsic charge model are derived using the developed SP model. Various real device effects like: velocity saturation, drain-induced barrier lowering (DIBL), self-heating, field dependent mobility, non-linear access region resistances etc. are included in the core drain current model to represent real GaN HEMTs. Field-plate (FP) model is incorporated to predict accurate current and capacitance trends observed in the high power GaN HEMTs with source and gate connected field-plates. Along with the gate current model, non-linear trapping effects are also included in the model to capture larghe-signal high-frequency device behavior. This model is extensively validated with the experimental data of both high power and high frequency GaN HEMTs.

Original languageEnglish
Title of host publication2016 3rd International Conference on Emerging Electronics (ICEE)
Place of PublicationPiscataway, NJ, USA
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
ISBN (Electronic)9781509036592
ISBN (Print)9781509036608
Publication statusPublished - 18 Oct 2017
Externally publishedYes
Event3rd International Conference on Emerging Electronics, ICEE 2016 - Mumbai, India
Duration: 27 Dec 201630 Dec 2016


Conference3rd International Conference on Emerging Electronics, ICEE 2016


  • AlGaN/GaN HEMTs
  • compact model


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