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Two-section models for capturing the lateral ac emitter-current crowding effect, which is also known as the lateral nonquasi-static (NQS) effect, are presented following a consistent approach based on a model formulation for ac operating condition. Following the theoretical results, model formulations suitable for implementation in the large-signal domain are developed. The proposed two-section model...
The state-of-the-art and π-models for the lateral non-quasi-static (NQS) effect are analyzed. The superiority of the π-model to capture the lateral NQS effect is demonstrated through small-signal simulations of both the models, implemented in Verilog-A. A hybrid model is proposed and a corresponding formulation of the base impedance is obtained. The equation gives the base impedance of the state-of-the-art...
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