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transistors - Analysis of high Frequency Hybrid-pi model of a BJT - Electrical Engineering Stack Exchange
![transistors - Why are the current directions in the hybrid-\$\pi\$ model for BJT the same for both NPN and PNP? - Electrical Engineering Stack Exchange transistors - Why are the current directions in the hybrid-\$\pi\$ model for BJT the same for both NPN and PNP? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/128ao.png)
transistors - Why are the current directions in the hybrid-\$\pi\$ model for BJT the same for both NPN and PNP? - Electrical Engineering Stack Exchange
![Figure 5.13 from Elen-325. Introduction to Electronic Circuits Chapter 5 Bi-polar Junction Transistor | Semantic Scholar Figure 5.13 from Elen-325. Introduction to Electronic Circuits Chapter 5 Bi-polar Junction Transistor | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/015ac7f2db04dc1fc3ed2058b57616718867db92/12-Figure5.13-1.png)
Figure 5.13 from Elen-325. Introduction to Electronic Circuits Chapter 5 Bi-polar Junction Transistor | Semantic Scholar
![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
![Hybrid-small-signal equivalent-circuit model of a BJT transistor (after... | Download Scientific Diagram Hybrid-small-signal equivalent-circuit model of a BJT transistor (after... | Download Scientific Diagram](https://www.researchgate.net/publication/3120544/figure/fig1/AS:434121295044622@1480513990982/Hybrid-small-signal-equivalent-circuit-model-of-a-BJT-transistor-after-10.png)