Bypassed emitter resistor for higher gain in common emitter amplifier - third variation
@nemethakos
9 years ago
https://everycircuit.com/circuit/6468122100105216
Art of Electronics 3rd ed. Figure 2.51
The emitter circuit splits the signal and DC paths This enables to vary the gain without bias change.
The transistor tries to be a 2N2222 (values are from SPICE model: IS =3.0611E-14, BF =220, BR =4)