![transistors - Are the AC resistances in the hybrid pi model and the T model of BJT the same? - Electrical Engineering Stack Exchange transistors - Are the AC resistances in the hybrid pi model and the T model of BJT the same? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/2FU7j.jpg)
transistors - Are the AC resistances in the hybrid pi model and the T model of BJT the same? - Electrical Engineering Stack Exchange
Why do we need a hybrid model for a transistor? What are the differences between a hybrid model and a hybrid-pi model for a transistor? - Quora
![transistors - Analysis of high Frequency Hybrid-pi model of a BJT - Electrical Engineering Stack Exchange transistors - Analysis of high Frequency Hybrid-pi model of a BJT - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/IjblM.png)