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A new parameter extraction technique for small-signal equivalent circuit of polysilicon emitter bipolar transistors

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3 Author(s)
Seonghearn Lee ; Semicond. Devices Res. Div., Electron. & Telecommun. Res. Inst., Daejeon, South Korea ; B. R. Ryum ; Sang Won Kang

We propose a new parameter extraction method for advanced polysilicon emitter bipolar transistors. This method is based on the predetermination of equivalent circuit parameters using the analytical expressions of de-embedded Z-parameters of these devices. These parameter values are used as initial values for the parameter extraction process using optimization. The entire device equivalent circuit, containing RF probe pad and interconnection circuit parameters extracted by test structures, is optimized to fit measured S-parameters for eliminating de-embedding errors due to the imperfection of pad and interconnection test structures. The equivalent circuit determined by this method shows excellent agreement with the measured S-parameters from 0.1 to 26.5 GHz

Published in:

IEEE Transactions on Electron Devices  (Volume:41 ,  Issue: 2 )