transistors - Why are the current directions in the hybrid-\$\pi\$ model for BJT the same for both NPN and PNP? - Electrical Engineering Stack Exchange
Hybrid Equivalent of Transistor
Hybrid Equivalent of Transistor
File:NPN BJT Hybrid Pi model common-emitter high frequency.svg - Wikimedia Commons
Small Signal Analysis (Hybrid π model) for the Emitter Follower (CC) Circuit - CS Posts