Hybrid pi model with parasitics — Free Electronics Illustration

Electronics

Hybrid pi model with parasitics

Compact small-signal hybrid-π transistor equivalent circuit in clean black textbook schematic line-art, with labeled base, collector, and emitter terminals. A base spreading resistor r_x is in series with the base input, and a resistor r_pi is connected between base and emitter. A transconductance-controlled dependent current source runs from collector to emitter, with an output resistance branch between collector and emitter. Parasitic capacitances are included: a capacitor C_pi between base and emitter and a feedback capacitor C_mu between base and collector. The schematic is clearly arranged as a reusable analytical model block.

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